Ants were no longer spawning or making eggs. My ant hill had no workers. The ants were all either trapped in rocks in the NorthWest of the map or stuck chasing aphids or weevils.
Maybe there could be a timer for how long an ant will chase something. Also maybe ants have to return by a certain time.
Also ants clipping into rocks is a problem.
The Ants are trapped in rocks. Gas arrows work well for killing ants that you can't hit. Kill these groups of trapped ants and they will spawn in the hill. I wish ants wouldn't get stuck in rocks or stuck trying to chase aphids or weevils.