So I was in the nether exploring a Piglin bastion when one of the piglins pushed me into the lava, I said "no worries, I have a totem and a fire resistance potion, I'm fine." So when I finally pop the totem I get the 30 seconds of fire resistance from it and then I drink and 8 minute fire resistance potion. But when the 30 seconds of the totem are up, it got rid of my fire resistance potion too. This event happened to me 2 different times in one day and I nearly lost all my netherite gear ( because they burn in lava now) luckily I managed to fly away with my elytra before I died. I encountered this bug on a realm, idk if that matters or not.