no loots drop

I was doing Strand T16 when I entered I did wisp cave thing (missed that league) then when back to map I did Alva and noticed there was no drop at all. I cleared the whole map and not a single drop. I got some loot in inventory, but I can't remember are they from wisps cave or from few monster before doing Alva. Anyway, cleared the whole map and not a single drop.

Note: not issue of filter or Z button. I can throw items from my inventory and still shown.

thank you very much.
I didn't noticed that and I didn't know about such mod.