Clicking on the Main Editor Tab on the Windows Taskbar brings the Main Editor to the forefront.

Here is what I am talking about:

This is an interesting bug and I’ll investigate it a bit further as it appears that the wrong window is being activated.

I believe I was able to resolve the issue mentioned above in https://github.com/EpicGames/UnrealEngine/pull/6250 , still to be reviewed by Epic. Cheers,