diff --git a/templates/repo/branch_dropdown.tmpl b/templates/repo/branch_dropdown.tmpl
index 7b39830df8..8f58826c6a 100644
--- a/templates/repo/branch_dropdown.tmpl
+++ b/templates/repo/branch_dropdown.tmpl
@@ -69,9 +69,9 @@
 
 <div class="js-branch-tag-selector {{if .ContainerClasses}}{{.ContainerClasses}}{{end}}">
 	{{/* show dummy elements before Vue componment is mounted, this code must match the code in BranchTagSelector.vue */}}
-	<div class="ui dropdown custom">
-		<button class="branch-dropdown-button gt-ellipsis ui basic small compact button tw-flex tw-m-0">
-			<span class="text tw-flex tw-items-center tw-mr-1 gt-ellipsis">
+	<div class="ui dropdown custom branch-selector-dropdown">
+		<div class="ui button branch-dropdown-button">
+			<span class="flex-text-block gt-ellipsis">
 				{{if .release}}
 					{{ctx.Locale.Tr "repo.release.compare"}}
 				{{else}}
@@ -84,6 +84,6 @@
 				{{end}}
 			</span>
 			{{svg "octicon-triangle-down" 14 "dropdown icon"}}
-		</button>
+		</div>
 	</div>
 </div>
diff --git a/templates/repo/issue/branch_selector_field.tmpl b/templates/repo/issue/branch_selector_field.tmpl
index ed0d58cf27..e9e5574cd7 100644
--- a/templates/repo/issue/branch_selector_field.tmpl
+++ b/templates/repo/issue/branch_selector_field.tmpl
@@ -4,10 +4,12 @@
 <form method="post" action="{{$.RepoLink}}/issues/{{.Issue.Index}}/ref" id="update_issueref_form">
 	{{$.CsrfTokenHtml}}
 </form>
-{{/* TODO: share this branch selector dropdown with the same in repo page */}}
-<div class="ui {{if not .HasIssuesOrPullsWritePermission}}disabled{{end}} floating filter select-branch dropdown tw-max-w-full" data-no-results="{{ctx.Locale.Tr "no_results_found"}}">
-	<div class="ui basic small button">
-		<span class="text branch-name gt-ellipsis">{{if .Reference}}{{$.RefEndName}}{{else}}{{ctx.Locale.Tr "repo.issues.no_ref"}}{{end}}</span>
+<div class="ui dropdown select-branch branch-selector-dropdown {{if not .HasIssuesOrPullsWritePermission}}disabled{{end}}"
+	data-no-results="{{ctx.Locale.Tr "no_results_found"}}"
+	{{if not .Issue}}data-for-new-issue="true"{{end}}
+>
+	<div class="ui button branch-dropdown-button">
+		<span class="text-branch-name gt-ellipsis">{{if .Reference}}{{$.RefEndName}}{{else}}{{ctx.Locale.Tr "repo.issues.no_ref"}}{{end}}</span>
 		{{if .HasIssuesOrPullsWritePermission}}{{svg "octicon-triangle-down" 14 "dropdown icon"}}{{end}}
 	</div>
 	<div class="menu">
@@ -15,26 +17,18 @@
 			<i class="icon">{{svg "octicon-filter" 16}}</i>
 			<input name="search" placeholder="{{ctx.Locale.Tr "repo.filter_branch_and_tag"}}...">
 		</div>
-		<div class="header">
-			<div class="ui grid">
-				<div class="two column row">
-					<a class="reference column muted" href="#" data-target="#branch-list">
-						<span class="text black">
-							{{svg "octicon-git-branch" 16 "tw-mr-1"}}{{ctx.Locale.Tr "repo.branches"}}
-						</span>
-					</a>
-					<a class="reference column muted" href="#" data-target="#tag-list">
-						<span class="text">
-							{{svg "octicon-tag" 16 "tw-mr-1"}}{{ctx.Locale.Tr "repo.tags"}}
-						</span>
-					</a>
-				</div>
-			</div>
+		<div class="branch-tag-tab">
+			<a class="branch-tag-item reference column muted active" href="#" data-target="#branch-list">
+				{{svg "octicon-git-branch" 16 "tw-mr-1"}} {{ctx.Locale.Tr "repo.branches"}}
+			</a>
+			<a class="branch-tag-item reference column muted" href="#" data-target="#tag-list">
+				{{svg "octicon-tag" 16 "tw-mr-1"}} {{ctx.Locale.Tr "repo.tags"}}
+			</a>
 		</div>
 		<div class="branch-tag-divider"></div>
-		<div id="branch-list" class="scrolling menu reference-list-menu {{if not .Issue}}new-issue{{end}}">
-			{{if .Reference}}
-				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#">{{ctx.Locale.Tr "repo.clear_ref"}}</a></strong></div>
+		<div id="branch-list" class="scrolling menu reference-list-menu">
+			{{if or .Reference (not .Issue)}}
+				<div class="item text small" data-id="" data-name="{{ctx.Locale.Tr "repo.issues.no_ref"}}" data-id-selector="#ref_selector"><strong><a href="#">{{ctx.Locale.Tr "repo.clear_ref"}}</a></strong></div>
 			{{end}}
 			{{range .Branches}}
 				<div class="item" data-id="refs/heads/{{.}}" data-name="{{.}}" data-id-selector="#ref_selector" title="{{.}}">{{.}}</div>
@@ -42,9 +36,9 @@
 				<div class="item">{{ctx.Locale.Tr "no_results_found"}}</div>
 			{{end}}
 		</div>
-		<div id="tag-list" class="scrolling menu reference-list-menu {{if not .Issue}}new-issue{{end}} tw-hidden">
-			{{if .Reference}}
-				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#">{{ctx.Locale.Tr "repo.clear_ref"}}</a></strong></div>
+		<div id="tag-list" class="scrolling menu reference-list-menu tw-hidden">
+			{{if or .Reference (not .Issue)}}
+				<div class="item text small" data-id="" data-name="{{ctx.Locale.Tr "repo.issues.no_ref"}}" data-id-selector="#ref_selector"><strong><a href="#">{{ctx.Locale.Tr "repo.clear_ref"}}</a></strong></div>
 			{{end}}
 			{{range .Tags}}
 				<div class="item" data-id="refs/tags/{{.}}" data-name="tags/{{.}}" data-id-selector="#ref_selector">{{.}}</div>
diff --git a/templates/repo/issue/labels/labels_sidebar.tmpl b/templates/repo/issue/labels/labels_sidebar.tmpl
index be30baba92..0b7b9b8969 100644
--- a/templates/repo/issue/labels/labels_sidebar.tmpl
+++ b/templates/repo/issue/labels/labels_sidebar.tmpl
@@ -1,6 +1,6 @@
 <div class="ui labels list">
-	<span class="no-select item {{if .root.HasSelectedLabel}}tw-hidden{{end}}">{{ctx.Locale.Tr "repo.issues.new.no_label"}}</span>
 	<span class="labels-list">
+		<span class="no-select {{if .root.HasSelectedLabel}}tw-hidden{{end}}">{{ctx.Locale.Tr "repo.issues.new.no_label"}}</span>
 		{{range .root.Labels}}
 			{{template "repo/issue/labels/label" dict "root" $.root "label" .}}
 		{{end}}
diff --git a/web_src/css/base.css b/web_src/css/base.css
index bca581eae6..bf88adb453 100644
--- a/web_src/css/base.css
+++ b/web_src/css/base.css
@@ -875,6 +875,7 @@ input:-webkit-autofill:active,
 
 .ui.dropdown .scrolling.menu {
   border-color: var(--color-secondary);
+  border-radius: 0 0 var(--border-radius) var(--border-radius) !important;
 }
 
 .color-preview {
diff --git a/web_src/css/repo.css b/web_src/css/repo.css
index 0b46f6b69f..cc09ec94e2 100644
--- a/web_src/css/repo.css
+++ b/web_src/css/repo.css
@@ -2748,23 +2748,6 @@ tbody.commit-list {
   }
 }
 
-.branch-dropdown-button {
-  max-width: 340px;
-  vertical-align: bottom !important;
-}
-
-@media (min-width: 768px) and (max-width: 991.98px) {
-  .branch-dropdown-button {
-    max-width: 185px;
-  }
-}
-
-@media (max-width: 767.98px) {
-  .branch-dropdown-button {
-    max-width: 165px;
-  }
-}
-
 .commit-status-header {
   /* reset the default ".ui.attached.header" styles, to use the outer border */
   border: none !important;
@@ -2841,32 +2824,70 @@ tbody.commit-list {
   max-height: 200px;
 }
 
-/* Branch tag selector - TODO: Merge this into the same selector on repo page */
-.repository .issue-content .issue-content-right  .ui.grid .column.row {
-  padding: 10px;
-  padding-bottom: 0;
+.branch-selector-dropdown {
+  max-width: 100%;
 }
-.repository .issue-content .issue-content-right  .ui.grid .column.muted {
-  padding: 0;
+
+.ui.dropdown.branch-selector-dropdown > .menu {
+  margin-top: 4px;
 }
-.repository .issue-content .issue-content-right  .ui.grid .column.muted .text {
+
+.branch-selector-dropdown .branch-dropdown-button {
+  margin: 0;
+  max-width: 340px;
+  line-height: var(--line-height-default);
+}
+
+/* FIXME: These media selectors are not ideal (just keep them from old code).
+    There are many different pages, some need the max-width while some others don't,
+    they should be tested and improved in the future. */
+@media (min-width: 768px) and (max-width: 991.98px) {
+  .branch-selector-dropdown .branch-dropdown-button {
+    max-width: 185px;
+  }
+}
+
+@media (max-width: 767.98px) {
+  .branch-selector-dropdown .branch-dropdown-button {
+    max-width: 165px;
+  }
+}
+
+.branch-selector-dropdown .branch-tag-tab {
+  padding: 0 10px;
+}
+
+.branch-selector-dropdown .branch-tag-item {
   display: inline-block;
   padding: 10px;
-  width: 100%;
-  text-align: center;
   border: 1px solid transparent;
   border-bottom: none;
 }
-.repository .issue-content .issue-content-right .ui.grid .column.muted .text.black {
+
+.branch-selector-dropdown .branch-tag-item.active {
   border-color: var(--color-secondary);
   background: var(--color-menu);
   border-top-left-radius: var(--border-radius);
   border-top-right-radius: var(--border-radius);
 }
-.repository .issue-content .issue-content-right .ui.dropdown  .scrolling.menu {
-  border-top: none;
-}
-.repository .issue-content .issue-content-right .branch-tag-divider {
-  margin-top: -1px;
+
+.branch-selector-dropdown .branch-tag-divider {
+  margin-top: -1px !important;
   border-top: 1px solid var(--color-secondary);
 }
+
+.branch-selector-dropdown .scrolling.menu {
+  border-top: none !important;
+}
+
+.branch-selector-dropdown .menu .item .rss-icon {
+  visibility: hidden; /* only show RSS icon on hover */
+}
+
+.branch-selector-dropdown .menu .item:hover .rss-icon {
+  visibility: visible;
+}
+
+.branch-selector-dropdown .scrolling.menu .loading-indicator {
+  height: 4em;
+}
diff --git a/web_src/js/components/RepoBranchTagSelector.vue b/web_src/js/components/RepoBranchTagSelector.vue
index c13af14dea..8a741b68da 100644
--- a/web_src/js/components/RepoBranchTagSelector.vue
+++ b/web_src/js/components/RepoBranchTagSelector.vue
@@ -246,9 +246,9 @@ export function initRepoBranchTagSelector(selector) {
 export default sfc; // activate IDE's Vue plugin
 </script>
 <template>
-  <div class="ui dropdown custom">
-    <button class="branch-dropdown-button gt-ellipsis ui basic small compact button tw-flex tw-m-0" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
-      <span class="text tw-flex tw-items-center tw-mr-1 gt-ellipsis">
+  <div class="ui dropdown custom branch-selector-dropdown">
+    <div class="ui button branch-dropdown-button" @click="menuVisible = !menuVisible" @keyup.enter="menuVisible = !menuVisible">
+      <span class="flex-text-block gt-ellipsis">
         <template v-if="release">{{ textReleaseCompare }}</template>
         <template v-else>
           <svg-icon v-if="isViewTag" name="octicon-tag"/>
@@ -257,7 +257,7 @@ export default sfc; // activate IDE's Vue plugin
         </template>
       </span>
       <svg-icon name="octicon-triangle-down" :size="14" class-name="dropdown icon"/>
-    </button>
+    </div>
     <div class="menu transition" :class="{visible: menuVisible}" v-show="menuVisible" v-cloak>
       <div class="ui icon search input">
         <i class="icon"><svg-icon name="octicon-filter" :size="16"/></i>
@@ -317,43 +317,3 @@ export default sfc; // activate IDE's Vue plugin
     </div>
   </div>
 </template>
-<style scoped>
-.branch-tag-tab {
-  padding: 0 10px;
-}
-
-.branch-tag-item {
-  display: inline-block;
-  padding: 10px;
-  border: 1px solid transparent;
-  border-bottom: none;
-}
-
-.branch-tag-item.active {
-  border-color: var(--color-secondary);
-  background: var(--color-menu);
-  border-top-left-radius: var(--border-radius);
-  border-top-right-radius: var(--border-radius);
-}
-
-.branch-tag-divider {
-  margin-top: -1px !important;
-  border-top: 1px solid var(--color-secondary);
-}
-
-.scrolling.menu {
-  border-top: none !important;
-}
-
-.menu .item .rss-icon {
-  display: none; /* only show RSS icon on hover */
-}
-
-.menu .item:hover .rss-icon {
-  display: inline-block;
-}
-
-.scrolling.menu .loading-indicator {
-  height: 4em;
-}
-</style>
diff --git a/web_src/js/features/repo-legacy.js b/web_src/js/features/repo-legacy.js
index 18d98c891d..670e60def0 100644
--- a/web_src/js/features/repo-legacy.js
+++ b/web_src/js/features/repo-legacy.js
@@ -19,7 +19,7 @@ import {initCompReactionSelector} from './comp/ReactionSelector.js';
 import {initRepoSettingBranches} from './repo-settings.js';
 import {initRepoPullRequestMergeForm} from './repo-issue-pr-form.js';
 import {initRepoPullRequestCommitStatus} from './repo-issue-pr-status.js';
-import {hideElem, showElem} from '../utils/dom.js';
+import {hideElem, queryElemChildren, showElem} from '../utils/dom.js';
 import {POST} from '../modules/fetch.js';
 import {initRepoIssueCommentEdit} from './repo-issue-edit.js';
 
@@ -56,16 +56,19 @@ export function initRepoCommentForm() {
   }
 
   function initBranchSelector() {
-    const $selectBranch = $('.ui.select-branch');
+    const elSelectBranch = document.querySelector('.ui.dropdown.select-branch');
+    const isForNewIssue = elSelectBranch.getAttribute('data-for-new-issue') === 'true';
+
+    const $selectBranch = $(elSelectBranch);
     const $branchMenu = $selectBranch.find('.reference-list-menu');
-    const $isNewIssue = $branchMenu.hasClass('new-issue');
-    $branchMenu.find('.item:not(.no-select)').on('click', async function () {
-      const selectedValue = $(this).data('id');
+    $branchMenu.find('.item:not(.no-select)').on('click', async function (e) {
+      e.preventDefault();
+      const selectedValue = $(this).data('id'); // eg: "refs/heads/my-branch"
       const editMode = $('#editing_mode').val();
       $($(this).data('id-selector')).val(selectedValue);
-      if ($isNewIssue) {
-        $selectBranch.find('.ui .branch-name').text($(this).data('name'));
-        return;
+      if (isForNewIssue) {
+        elSelectBranch.querySelector('.text-branch-name').textContent = this.getAttribute('data-name');
+        return; // only update UI&form, do not send request/reload
       }
 
       if (editMode === 'true') {
@@ -84,9 +87,9 @@ export function initRepoCommentForm() {
     });
     $selectBranch.find('.reference.column').on('click', function () {
       hideElem($selectBranch.find('.scrolling.reference-list-menu'));
-      $selectBranch.find('.reference .text').removeClass('black');
-      showElem($($(this).data('target')));
-      $(this).find('.text').addClass('black');
+      showElem(this.getAttribute('data-target'));
+      queryElemChildren(this.parentNode, '.branch-tag-item', (el) => el.classList.remove('active'));
+      this.classList.add('active');
       return false;
     });
   }