Endless animation loop in story mode when casting creatures

For two or three weeks this has been an ongoing issue. Whenever a creature is cast onto a battlefield which has one or several creatures already, an endless animation loop begins with an effect that looks like a zombie jumping to and fro between two creatures, no matter if these are two creatures owned by the player or one owned by the player and the other by the enemy. This animation loop is never resolved, it can only be terminated by answering "yes" and thus ending the loop when the loop detection prompt appears.
Even then it takes several seconds until the battle phase finally begins. Obviously all remaining cards in the player hand with full mana are not played.

This is incredibly annoying since the player is forced to sit there for an incredibly long amount of time while effectively nothing happens. I can't say if this behaviour is tied to any specific encounters or opponents, but it just happened again while fighting the first node of this week's story.