Description: (Singleplayer) I was trying to capture an AI's city that had been originally owned by another AI (let's say the original owner is Ghanaians and it was later captured by Inkas) in order to return it to its original owner. As soon as I initiated the fight, the city instantly returned back to the original owner (with no notifications regarding this event) and I got a new grievances against the Ghanaians (the original owners) saying that they surrendered to themselves, which obviously doesn't make sense.

Attachments:

1. A screenshot of the grievance: 20210820200218_1.jpg
2. Last 2 save files (technically were saved on the version 1.0.1.58, but I checked that it's still bugged on the latest version): auto-save 150.ctr Франки Ход 151.ctr

Steps to Reproduce:

1. Have an AI's city captured by a different AI
2. While the two AI's are still at war (don't know if it matters), attack this city