Encounter with Ancient Mud Mephits and a few wood beasts is absolute chaos in the small area it takes place in.

The encounter quickly became unplayable as the game tried to figure out pathing and combat moves for the Mephits when too many of them were spawned. I don't know if this would be a bug in the enemy AI since they almost continually spawned Young Mud Mephits one after another until a ridiculous amount were in play.

On enemy turns it would take 2-3 minutes per enemy on "Plotting Next move..." and "Getting in Range..." parts of their attacks. It'd eventually seem to just time out and move on to the next enemy. I was about 30 minutes into this encounter before losing all hope and chalking it up to being unplayable.

https://i.imgur.com/aDyA7sC.jpg