Minecraft dungeons item drop bug?

I have the problem with mc dungeons that I play on the maximum level of difficulty with both the 3 levels and the level difficulty, I play it co-op but the items I get dropped are a much lower level than his, with him you can only do items from lvl 100 and I get 88-98, and if I lower the difficulty by one level items 88-97, that can't be right. How do I fix the bug / what can I change on it?

The drops also depend on your current strength. If you are currently at 90 you will also get items in the area.