Since nobody had brought this up for a long time, I have to bring this up.

There's a dungeon in Medieval Highlands that looks like a colosseum. The dungeon's miniboss area may look large but the area that registers the objective is extremely small.

Here's a picture of my character standing beside the cursed skull but the objective doesn't show up.

This will cause the player to not gain any experience points upon completing the objective as the player wasn't in the "quest area".

The problem had been persistent for years. I would suggest the devs to either contact the creator of this dungeon to work on a redesign or get the dungeon removed for good.