diff --git a/src/platforms/GitHub/DOMHelper.ts b/src/platforms/GitHub/DOMHelper.ts
index c83a764..7ff7b6c 100644
--- a/src/platforms/GitHub/DOMHelper.ts
+++ b/src/platforms/GitHub/DOMHelper.ts
@@ -27,7 +27,8 @@ export function isInRepoPage() {
 
 export function isInCodePage() {
   const branchListSelector = ['#branch-select-menu', '.branch-select-menu'].join()
-  return Boolean($(branchListSelector))
+  // The element may still exist in DOM for PR pages, but not visible
+  return Boolean($(branchListSelector, e => e.offsetWidth > 0 && e.offsetHeight > 0))
 }
 
 export function getIssueTitle() {
@@ -259,3 +260,7 @@ export function getPath() {
     .slice(1) // the first is the repo's name
   return path
 }
+
+export function isNativePRFileTreeShown() {
+  return $('file-tree[data-target="diff-layout.fileTree"]')
+}
diff --git a/src/platforms/GitHub/index.ts b/src/platforms/GitHub/index.ts
index 136ee8c..4401621 100644
--- a/src/platforms/GitHub/index.ts
+++ b/src/platforms/GitHub/index.ts
@@ -168,7 +168,7 @@ export const GitHub: Platform = {
     return await getRepositoryTreeData(metaData, path, recursive, accessToken)
   },
   shouldShow() {
-    return Boolean(DOMHelper.isInCodePage() || URLHelper.isInPullPage())
+    return Boolean(DOMHelper.isInCodePage() || (URLHelper.isInPullPage() && !DOMHelper.isNativePRFileTreeShown()))
   },
   shouldExpandAll() {
     return Boolean(URLHelper.isInPullPage())