I just saw AI Austria surrender to France, even though we are not at war. I know this bug was reported in 1.01a, but thought it had been addressed. Maybe not? This is in 1.01b.
Also, when that happened, Austria went into instability and Austria's sponsored minor, which France had invaded, became French. Now, I should have gotten conquest before (see posts above), but it should NOT happen this way, I think.
Control should be transferred only if there are ENEMY forces present. France and Austria were not at war, of course, but even if they were, this sort of transfer should only happen if instability occurs WHILE they're at war, right? In this case, instability was the consequence of surrender--at which point the "war" was over. Maybe the program, having invented the war in which Austria surrendered, also invented a state of war continuing after the surrender?
I wonder whether this surrender bug is actually related to the forced access/sponsored minor bug. Is the AI reacting to imminent loss of its territory by pre-emptive surrender, whether there's a war or not?