Begara said:

I have been doing this dungeon challenge the whole day and cant seem to do it. I do everything right i am on stage 5 of the force keep i place the decrease def debuff and i complete the level but it still doesnt say i did the challenge.

Hello!

I have tried this and also doesnt work. I have video proof

Screen me description of that challenge. Maybe we're missing something.

I had this issue too,