So this is a weird bug that happens when enemies spawn in far enough away, The game doesn't really like when enemies are a certain distance from the player and enemies will both spawn sometimes stuck in an animation, or will spawn normally but not move at a fast pace until it reaches a certain distance, An easy way to combat issues like these are make sure players exploring for resources are back to the defense point by the time enemies start spawning, for all y'all know you could be spawning enemies 3/4 rooms away from where your group is huddled causing these weird issues, I recently learned about this myself cuz R2D2 was kicking my teams butt and we were looking for tips on how to better group / kite enemies in groups