I too had problem with cinnamon buns,, ;-))) ;-)))))
I have a Kitchenaide Superba oven it has 3 heating elements, the lowest one is under the floor of the oven,, any way,,,,,,,,
I made cinnamon buns, looked good going into the oven nicely puffed so all was well, untill the brown sugar etc that was/did melt, boiled over out of the pan, all over the floor of the oven, it burnt on contact, thick smoke beltched out of the oven the fire alarm went off, OMG what a shamozze. the buns wre only partially baked....... :-))))))
Plus a thick black crust to get off the oven floor.