Char. ‘Giantus’ on 'Terokkar.
Getting ‘Flash Freeze’ azerite power as first suggestion on my chest.
Giantus is a Fire Mage, and can not make that choise.
That’s most likely caused by the order your setups are in or your azerite threshold on the setup tab - nut without seeing your setups that’s all anyone could say.
If you want a more specific answer you could click on the “Help” link above Best in Bag to create a snapshot id and post that here. With that we could see your exact settings and see what exactly the issue is.