While this mod is active the blaze cake doesn't cause the blaze burner to become overheated, instead acting like regular fuel.
Mod version: Create-DnDesire-1.20.1-0.1b.Release-Early-Dev.jar (for Forge).

Also have this issue. Seems related to adding ablaze rods to the special fuels before the tag is ready

install Load my F***ing Tags will fix the issue currently
it will be fixed next update its a known issue