Enemys getting stuck in Similacrum getting completely dmg immune and unable to finish run

As stated i had it like 5 times now that an enemy gets stuck in the edge of the arena and then becomes fully dmg immune. I can see it. I can hit it but it does not get dmg in any way or form bricking the run fully and having to restart it.

The enemy gets stuck on some kind of object and just stands there. I can hover over it and focus it with spells or attacks but it does not get any dmg.

This happend in various diffrent stages of the run and on different objects. The image added is only one example.

When i leave and rejoin the arena the Window to continue the run pops up like normal but is unclickable so the run is fully bricked then.