Hello, I deactivated Lavender's fire heart to get the achievement and when I enter the room with my kyurem it continues to protect me.
I don't have any fire pokemon on my team. just the movement of kyurem.

Hi. Thank you for contacting us about your issue.

 

Did you made sure none of the Pokémon you brought into the dungeon had a Fire type move (even Status moves like Sunny Day or Will-O-Wisp)? Because it's important to remember, the Hearts make it so any Pokémon with a least one move of the corresponding Heart type are considered being of that type and apply the protection. Example: a Weavile with the move Sunny Day will be considered a Fire type despite being Dark/Ice type.

 

If you were sure you had no Fire type Pokémon and none of the Pokémon you brought had Fire type moves, kindly come back and mention it here so we can proceed with further assistance. Otherwise, we hope the information provided will be useful to you. Good luck in your adventures!

 

- Kubrick

Hi, basically I disabled the fire heart buff and it still counts as if it was active when entering the room.

 

Only Kyurem-White has a fire move. The other Pokémon are Diancie, Heracross and Donphan. And none of them have a fire move.

 

The problem is solved by removing the move from Kyurem. But even so, when deactivating the heart buff when entering the room, it should not activate with the movements. Clearly there is a problem with the deactivation mechanism.