Merge pull request #3482 from overleaf/jpa-cleanup-on-epoch-mismatch

[frontend] on editorOpenDocEpoch mismatch, cleanup the old doc

GitOrigin-RevId: b07beb33a17d218d7aa35961dee5e215bd82c315

services/web/frontend/js/ide/editor/EditorManager.js

@@ -273,6 +273,7 @@ export default (EditorManager = (function() {
               this.editorOpenDocEpoch
             } vs ${editorOpenDocEpoch}`
           )
+          new_sharejs_doc.leaveAndCleanUp()
           return callback(new Error('another document was loaded'))
         }
         this._bindToDocumentEvents(doc, new_sharejs_doc)