Just to add on, for some weird reason Arson watch does no damage/fire. It does trigger and show the animation however.

Just checked again, it does get replaced in name, but all it does is set the enemy on fire without the extra effects

For some reason my volatile flare is not replacing the normal flare, just burning and not giving all the extra nasty.

I remember it worked fine when I last played (last year) so I'm not sure if something changed or it's just some incompatibility with something in tedjam