Editor deletes Layout when pausing after maximise on play

For some reason, if I run my game in Maximise on Play, pause it, disable my UI and Player, unpause, then wait a bit, unity says it has to delete current layout and reset to default, after which I can continue (at which point it reverts the panel layout to the default state) or quit (the editor just closes). There is nothing in the profiler to indicate why this is happening, I get a consistent 200FPS and GC allocation never goes beyond 45 MB. This was just while not doing anything, so there were no scripts running apart from a shader graph shader.

I'm running Unity 2019.3.6f1 in 2D with URP, DX11. System is an Acer Predator Helios 300, Intel i5 8300H, Nvidia GeForce GTX 1050 Ti on Windows 10 home, version 10.0.18362 build 18362.

Any help is appreciated. As you can imagine, its annoying having to redo my layout every time I want to see how my shader looks