So i just won the game as the Americans, but wanted to continue the game to see how the nukes work. I was then just researching to get all the tech that i needed. Suddenly a rebel army appears and takes over one of my conquered cities. I think nothing of it and click next turn, but then it just loads endlessly, and doesn't move on. After i waited some time for the game to continue i just loaded a previous save from that game to try and move on from that. Then when i loaded the autosave from the previous turn, suddenly the same army took over my city again. Then i loaded a save from 5 turns before, and the army was still there, even though it wasn't there at that time. And when i clicked next turn the game would just stall. Since this weird rebelarmy appears across multiple saves they shouldn't, i think the two things might be connected somehow. I don't know how to recreate the bug, the only thing i know is that it's a rebel army, and that i took the city in question from another civ.

Save files:

auto-save 606.ctr

auto-save 607.ctr

auto-save 614.ctr

auto-save 615.ctr