More armies are idling than ever before

The Vampires and Skaven are from the same playthrough. The vampires were expanding a ton and then just stopped and have been idling on that city for the last 40+ turns. The Skaven was doing stuff and then randomly stopped and started idling on that city for who knows how long. Then in the other game the Dark Elves were idling there probably for half the game.

It's pretty consistent now that the AI just sits and does nothing. Also during wars I can see my AI allies move halfway towards an objective, turn back around, move halfway towards an objective, turn back around, etc forever. They refuse to actually make any real actions.