When I cooked some food in the smoker I already had some cooked food from a regular furnace and when i collected the food it didn’t stack even thoug it was the same kind of food 

Steps to Recreate

1.cook some food in the a furnace

2.cook the same kind of food in a smoker

3.collect the cook food from both furnace and smoker you will notice it won’t stack

Note this can be a serious problem because the food will take a extra slot you can use just because it won’t stack for some reason and it is also bad if your trying to cook the same food in multiple smokers and furna