Me and some friends ran into an issue with the second to last fight in the Downfall map in act 4.
The we have found out that the special animation of summoning the previous bosses that plays when starting the fight plays fine only for the first player that enters the fight.
Any other player that enters freezes due to the animation playing for them as well but the bosses in question are already spawned and as a result tries to spawn them again and then freezes when it tries to.
Is there a fix for this? Or do we have to wait for an update to do that?

However, we did find a work around for this...but it requires the other players besides the host to leave and let the host clear the fight by themselves, then re-invite the others back in and can fight the final boss just fine.