Cursed chest in Pandemonium Fortress level 2 no objective

In Pandemonium Fortress level 2, when a cursed chest spawns and is clicked - no objective appears. An enemy group spawns, but nothing happens when killed, and the chest despawns.
It has happened on multiple occasions and locations in Pandemonium Fortress level 2.

I’ve noticed this too. Same chest.

It’s like one of the mobs never appears, so it eventually disappears due to failure.

I’ve even gone and looked around to see if a mob happened to spawn on a different platform… Nope!

I can confirm now that on the switch port in the same area the same bug happens. A cursed chest that doesn’t initiate an event like the others an disappear as if failure in the event has taken place. Always on the pandemonium fortress 2 on different locations within the map

Same issue not fixed since 2014 year.