On resizing the editor Account, Layer, collaborate, global search and Layout buttons are not selectable, and the collaborate button is overlapping with the Layer & Layout button.

Steps to Reproduce:
1. Create a New Project
2. Resize Unity Editor Window

Actual Result:
Account, Layer, collaborate, global search and Layout buttons are not selectable.

Expected Result:
Account, Layer, collaborate, global search & Layout buttons should be selectable and work gracefully On resizing Editor window.

Occurring on:
2021.1.0a10, 2021.1.0a8

Working Fine:
2021.1.0a7

Environment:
macOS 10.15

Note: Unable to check on 2020.2.0f1, 2020.1.17f1 & 2019.4.16f1 because of this bug ID [1254983]