Cinderhulk is aggroing monsters again.

Cinderhulk was changed in 5.12 so that the flames wouldn't aggro monsters until you attacked them, this has somehow been reverted this patch.

EDIT: Nevermind, cinderhulk is working correctly, the issue is that immolate in general still automatically aggros. So when you have Bami's cinder as a component item it will pull them before you upgrade to cinderhulk.