Deep worms are still pretty buggy. When I move away from burrowed worm(s) they would sometimes burrowing and unburrowing for a long time and then skipped to my turn. In another instance I would hear the unburrowing sound effect (screen would shake) but the game is frozen on the worm's turn (can't see the worm on my screen, worm must be out of my line of sight in the psi pillar room).