[2022] New curse mastery doesn't seem to be working?

The new curse mastery grants life and mana upon cursing uncursed enemies. Similar wording to the ignite mastery. However, it doesn't seem to work, or at least not for my set up. For the record, I'm using blasphemy support. I'm also using hexblast traps. I didn't really expect recursing after hexblast to work, but the initial cursing doesn't seem to be doing anything either.

I would post this in a general discussion thread, but there doesn't seem to be one. So, anyone else have this problem or a fix for it?