Running tall targ, was soldier then vassal, just became marshal when I noticed no one was answering the call. I went around the keeps, and most of them were stuck in a loop, as lannisters were raiding the towns of a fort but not actually attacking.

The rest were at sea, waiting as their troops died off and they were picked off by raiders one by one, all the while "considering next objective."

I never saw if this was just a dragonstone thing, I tried to brute force through with cheats, commanding them to go to a specific town, or force them to besiege kings landing as I'd intended anyways. When that didn't work, and broke the game even further resulting in a perpetual war as Last Hearth was made King of the Andals and the First Men, Lord of the Seven Kingdoms, and Protector of the Realm, I just deleted the save out of salt.

My question is, how to avoid the AI breaking in future runs, and how to fix them if they do?