I am playing in a (maptest-)game where the creator of the map put a tower on a city. When I conquered the city I could move into the tower but the game froze and I had to restart it. After restarting I was standing on the tower but the tower was still neutral.
The opponent took the city back and I tried to move into it again. When I tried to move into the city directly I got that 'the target has changed' message meaning I couldnt do my move. Then I moved into the tower, neither the tower nor the city are mine tho and I suspect there are even troops in the tower.
The game is Crater Test 2.0
In the screenshot you see that my side is black but neither the city nor the tower are black.