[Bug] NPCs won't give XP

[Conkern65]

I have been having a recurring bug where NPCs do not drop XP no matter what when they die. It seems to be a 1.2 patch exclusive bug, as it works properly on vanilla.

Is there a way around this that can be done manually with Events? Like changing player parameter? They don't let you affect player XP in changing parameter. Is there a combination of events that can cause the player to gain XP?

I tried asking about this on Discord before and was told there's no way to fix this bug. Not sure if that's true, it works correctly on 1.0, just not on 1.2