The Furnace is Giving Wrong Item After Smelting

I have the Samsung Galaxy Note 4. Sometimes when i change my texture pack without restarting MCPE afterwards my furnace starts to give me the wrong item after smelting. For instance I put in a Cobblestone block and got back a Dirt block, I put in a piece of Raw Beef and got back a Raw Chicken, I put in Iron Ore and got back a Gold Ingot etc. etc. It stops when I restart MCPE even if I still keep the same texture pack on. Also the texture pack is not a DLC it is a PC texture pack called Faithful that I used a Resourse Converter app on to make it compatible with PE. Thank you for you time and have a nice day.