Sorry, no solution here. However, I can confirm it is mod related. I have had this happen several times and always in a CV game. Force closing the game and starting the client in safe mode gets me into the game and able to play normally, minus all mods, of course.
The peculiar thing is this bug is intermittent and happens maybe 1 in 20 games.
Edit: I just noticed the comment above about zoom mods. I have recently stopped using any enhanced zoom mods and have not had the bug since I did that. Might be a good place to start.