poehlerj
commented
3 years ago Hmm, I remember experiencing something similar in the past, but can't currently reproduce this. Can you tell me which Gnome-version you are on and which theme you are using? Since the extension doesn't modify the window itself, but rather let's gnome handle the removal of the titlebar, this is either a conflict with your theme, or you are using an older version of gnome-shell (<3.32) where the window was modified by the extension itself.
willgfx
After restoring a window from a tiled/maximized state, a corner appears on windows:
Before:
After:
The Pixel Saver extension doesn't exhibit this behavior, but I prefer No Title Bar's customization.