If you may, when this issue happens would you check if there are any errors that pop up in the console / 2nd window (The one that pops up along side with the game when running)? If there's nothing then I can only guess that it's an issue with your save that happened to due to an overlap of events/action that never returned back to order when finished.
I'll see if I can reproduce it and fix it however any information is gladly accepted!