45°38'N-13°47'E;13218190 said:
Well, this is something that didn't happen to me for ages. Actually, I was testing with autoplay but nevertheless, it's been years since I've seen one of my cities revolting to join another civ. Nice to know this feature still works. I re-enabled it months ago by making minimum city borders optional again, but it's the first time I see it working.
Looks like it works in reverse too
It's mousing over the wrong city since the message came up and was almost immediately followed up by a "Revolution Warning" message from two off-continent colonies I had.
Unfortunately, on the next turn I zipped over to Chaco Canyon to examine it and noticed that it was still under Churchill's control
This was after the situation in my colony got to the point where they approached me with their "terms" and thankfully it was a more peaceful one
("We don't want to fully break away from your empire" etc) so I vassalized them and lucky for me I was able to keep the city that had secured one of the very few sources of
Rubber in the world, as well as the two
Tea resources it had. Vicky up in the northern islands has half a dozen
Tea resources, but there's none on the main continent. Dunno if there's any
Rubber or not, but my massive empire had none.
Amusingly enough, the random leader that spawned was Sitting Bull, who would usually have been the original owner of the city I was allegedly granted control of, had I not been playing with Unrestricted Leaders
(Washington was the one who originally owned it, then rebellion-spawned Pacal of Russia took it, then Churchill of Khemer captured it)
smiley and the 
one too. 
