Spectres stuck in wisp-form

When using any Spectres, although more prevalent with melee Spectres, they often get stuck in wisp-form when walking and do not engage enemies or continue pathing to the player character. They still respond to minion move command but not to a minion command to attack an enemy. The wisps do not move unless ordered to or if the player comes close enough for them to leave wisp-form.

I've been having an issue in 3.27 with my spectres all turning into wisps in certain areas. They follow me but don't attack and only change beck if I change areas. It seems to happen most often when I need them most - in difficult maps or instances.