On clicking "Open in Search" in Project/Hierarchy window editor thrown EndLayoutGroup Error, refer to the attached video.

Steps to Repro:
1. Create a new project
2. Project/Hierarchy winodws> Click on "Open in Search" Icon

Actual Result:
EndLayoutGroup error is thrown in Console on clicking "Open in Search" in the Project/Hierarchy window

Expected Result:
No error in the console.

Reproducible in:
2021.1.0f1, 2021.1.0a7

Working Fine in:
2021.2.0a10

Note: "Open in Search" in the Project/Hierarchy window introduced in 2021.1.0a7

Environment: Ubuntu 18.04 LTS

Stack trace:
EndLayoutGroup: BeginLayoutGroup must be called first.
UnityEngine.GUIUtility:ProcessEvent (int,intptr,bool&) (at /home/bokken/buildslave/unity/build/Modules/IMGUI/GUIUtility.cs:189)