S4: Donkeys not following pre-existing trade routes

[Gizzmicbob]

If a donkey is created after a trade route is already set, it will not join the trade route.

Most of the time, removing the trade route and re-adding it will fix this.

I haven't figured out how to reproduce this but sometimes the marketplace will have to be rebuilt before the donkey will follow the trade route.

[Gizzmicbob]

Full Deadlock.zip

The donkey with a cart at the top of the map will not move even when destroying and recreating marketplaces + trade routes.

EDIT:
Savings the game seemed to instantly fix the donkey and allowed them to move.