[Gameplay] Poacher's Dirk does not stack

Hi,

guess I discovered a bug:

If you buy a second Poacher's Dirk, while the first one is not fully stacked, the second one won't stack at all, even after the first one is transformed to Serrated Dirk.

I tried this out in 2 games already. happend in both. This was not the case before 8.11

Cheers