Kill 90 while Tal Rasha stacked 4 times Season mode

Cannot complete mastery on this set dungeon in season mode. The number of kills remains at 0. Stacks work perfectly, but not registering in the dungeon. I am using:
Arcane Hydra
Blizzard
Electrocute
Arcane orb - scorch

Haven’t done it but there are guides:
https://maxroll.gg/resources/set-dungeons

And you can search on youtube too.
Maybe you don’t have all the 4 elements stacked while killing?

Maybe Hydra is not counting?: https://www.reddit.com/r/diablo3/comments/n09jd6/what_known_bugs_are_there_for_the_tal_rasha_set/

Or:

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This is likely player error. Double check your runes. The class dungeon is functional, to the best of my knowledge