Mutter keeps multiple copies of window-related things, moreso on X11 where the server is a separate process with its own idea of how big a window is. That also means a window gets resized in multiple processes at slightly different times. So it's easy to mess up in mutter and get bugs like this (I have done in the past).
Mutter keeps multiple copies of window-related things, moreso on X11 where the server is a separate process with its own idea of how big a window is. That also means a window gets resized in multiple processes at slightly different times. So it's easy to mess up in mutter and get bugs like this (I have done in the past).