If the AI's turn takes place on its territory, where the fog of war is active, we will still see a black screen. And in Multiplayer, it might be fairer if players couldn't see what the opponent is doing during their turn.
If this "feature" is implemented at the exe level, only those who can (and are willing) to modify the exe file can solve the problem.
I will examine the xdb set of files for windows and other elements from which the waiting screens are assembled. Perhaps the single-player version differs from its multiplayer counterpart by a simple black overlay, which would be easy to remove.
In general, please take a look; I would appreciate it.
Added 4 minutes later
, And in Multiplayer, it might be fairer if players couldn't see what the opponent is doing during their turn.