In Minecraft bedrock on the Xbox one, some items cooked or smelted in furnaces/smokers AFTER the update 1.13.0 will not stack with items cooked/smelted BEFORE the update.  For example: cooked fish, both salmon and cod, will not stack in my food chest after cooking.  I had a stack of 55 cod from before the update, and I cooked about 26 or so after the update.  After removing the 26 or so from the smoker and placing them in the chest, they did not properly combine the stack of 56 and 26 to form a full stack of 64 with however many left over.  I’ve noticed this also happens with salmon, as well as when smelting cobblestone into stone; neither stacks correctly.