Totem of undying give's fire protecition but prevents taking potion!

Hi Mojang!! This is a bug that can be is crucial in some moment's! well, as you know, using a Totem, it gives you Fire Protection right ?? More when using the totem, receive fire protection, if you are in the middle of the lava, you will not be able to take another fire potion to prolong the effect, you will have to wait for it to end, to take damage from the lava and then take the potion, this dificult a LOT because the player after use's the totem stay with 1 point of health, so please fix this bug! Bye Bye thank's!