Comment 28 for bug 1961508

Sebastian, are you using an external monitor connected to HDMI when this problem occurs?

I've just seen Andrea's comment above in number 3 and noticed that I have the same setup. Laptop with an external HDMI display plugged in.

I can now replicate the problem consistently. When I plug in the external HDMI monitor, the dock on my laptop overlaps the window. When I unplug the HDMI monitor the dock on my laptop goes back to normal.

So I believe this problem is related to using a HDMI external monitor. The external monitor doesn't have a dock and so it goes full screen which is correct. However, it also puts the laptop monitor full screen sometimes, and therefore the dock overlaps the window.