Armor that prevents debuffs while worn

Basically I have this command that sets the player to be a member of a race of cartoon characters and there's 2 different races you can pick: One is buffed by heat, but is weak to cold, and the other is buffed by cold, but is weak to heat. I managed to get the debuffs working based on biome temperature, but there's a heat suit you can wear to prevent the debuffs from affecting you. However, while the armor DOES stop the effects, after you take it off, the effects don't come back for some reason even though they should.