Cryo weapon setting enemies on fire

I’m lvl 39, FL4K, Stalker build. I’m favoring an Artic Reflexive Night Hawkin legendary SMG with Cyro dmg. But I keep setting enemies in fire when shooting them. I’ve checked class mods, relic, and skills and nothing I have adds Incendiary dmg. Is this a glitch? Is this something to be worried about?

Ugh, just found out it swaps between Cryo and Incendiary depending on whether it is night or day.