Infernal Hordes, wave 10 issue

We were playing a wave 10 infernal horde after completing the final wave we went to fight the 3 bosses and then after we killed them, none of the chests spawned. Not sure if anyone else encountered this issue

Not just that but we cant teleport out or leave dungeon from map or by hotkey (emote) So we’re trapped in hell! We don’t want to lose the stuff we aether we gathered.

Something (sort of) similar happened to my brother and I wherein there were 3 mobs that stayed spawned, could damage us, but were invincible.