Mine was very active at night when she was smaller. I was concerned she was stressed, but she seemed fine, and now she is 600gm and is rarely active that I notice, but she is a stealthy "furniture mover." She adjusts the position of her hides and rotates which way the entrance hole faces according to her preferences.

Every once in a while she gets really antsy and spends all night thumping around in there. I don't know what the frick she is up to but is sometimes sounds like she is body slamming the side of the tub.