I got a debuff with Lone Wolf

it was Frozen from an on-hit enemy artifact.

It was working fine before 9.2, I think. Maybe reversing the other stats in the hotfix reversed the debuff resistance too.

No, I’m still getting resists, so it must be something else.

I can confirm that you can get a debuff with a single creature and Lone Wolf (0.9.2)

I got poisoned by a Spitting Arachnalisk’s trait, too.

i just got (Lone Wolf) resist messages with a full party of creatures on all of them, maybe it works in reverse.