Tier 17 Valdo's Puzzle Box maps don't count for tier 17 map completion challenge

As title describes, completing a tier 17 Valdo's Puzzle Box map doesn't count for the T17 map completion challenge.

The endgame grind challenge states the following:
"Complete Tier 17 maps"

Valdo's Puzzle Box maps are tier 17 and thus should count towards the challenge.

Can confirm, happened to me as well. Received an item but not a 6th slot.

It really frustrated me, as at the time of completing I only had 2 watchstones, and t17s weren't really dropping for me.

Decided to ask global chat - the reason why it didn't count, though being a t17, is because it is not true t17, as it goes to the special slot in map stash, not normal t17 slot.

This is stupid and I agree with you, something needs to be changed. Either removing tier of valdo's map and replacing it with difficulty based on mods, so that it would be no longer be t17 or make valdo's t17s count for the 6th slot.