I have now the same problem on 5.3 project, so it’s maybe a “common” Layout file in “C:\Users\YourNamel\AppData\Local\UnrealEngine\Common” but my quick test didn’t succeed.
It’s no a stopping problem for me yet, but if I find something I’ll let you know.
I think Its definitively a bug, but as we are only three complaining, maybe there is something specific with our installation ?
I’m on Windows 10 x64 and I have unreal installation since 4.27 then 5.2, 5.3 and 5.4
Same issue here, with the floating content window. I built 5.4 from source, rebuilding didn’t fix it. It’s pretty annoying when you have to make code changes often and reopen the editor with a broken layout every time.