Titan Grotto Boss Arena Bug

The boss of the titan Grotto Area in Act 2 slowly destroys parts of the arena making it smaller in the process. When walking closely along the edge where the parts were broken off, you character starts to quickly jitter up and down, especially on the left side. This is probably not directly a bug but it still might cause some issues for some people during the fight. For me at least it happened when I wanted to hide behind the boss' dagger in the attack where you have to dodge his laser this way, and my character started bugging.

My partner and I are also encountering the same issues with the terrain in this boss fight. Its been as bad to bug me completely off the map at times making it difficult to fight the boss. Im noticing the same that it seems to occur more on the left hand side of the map where it breaks away.