(v21, linux)
1) When you press Esc key during loading screen or right before the map is loaded, it will the switch to black screen instead of map (paused as if on the menu). It stays there till yut press Esc again (as if when escaping from the menu back) and it will resume the game and shows the map.
2) The same happens during the "Victory!" effect. Esc pauses it and them resumes. Sometimes you can see a vague menu picture underneath.
Doesn't seem to me like bugs, so feel free to move, but the way how it behaves may cause confusion. Suddenly stuck...
Would it make a sense for the Esc key leading fully to menu screen in those moments too?