Master Spellcrafter seasonal objective bugged, resets to 0. Fix please. ASAP

The sixth objective, use ANY infusion is bugged. It resets to 0 all the time. All previous are done already, so, it should be at least 50.
When it happened to me first time, I found that it can happen when you switch seasonal power or change world level. I didn’t do any of that, just to be on safe side. I has been farming helltides and the pit yesterday and today, and managed to get it to 78. Then I was tired of all the same activity again and again, and went to NM dungeons. Then I learned this seasonal gem recipe. those were just 2 things that were out of my 2-day routine. I don’t know what else happened, but when I checked it next time it was back to 0.
It’s very frustrating.
Fix it please.

P.S. I also replaced Aldkin with Variana during this activity. I don’t know maybe this was the cause of reset… Anyway.

Update:

It reset from 67 to 0 again.

This time, I didn’t do, change, or switch anything.

I was just running The Pit.

I thought I was on the safe side.

But it looks like it reset to 0 when I finished Pit 50.

I don’t understand. How are we supposed to finish this achievement? It just blocks the whole next seasonal chapter for me. There’s another way to kill Andi and Duriel on T2. But I hate those bosses. I can stand Duriel, but I will never kill Andariel, except on T1. I hate this boss and am not going to do it.

Fix your game already! We paid for it, and we’re still paying.