when inputting food items to a skillet, if the total amount of items exceeds a stack i.e. 34 on pan and 40 in hand inputting the 40 wont take away any, but it will still add to the skillet. 64 on pan 40 in hand. this is only tested with sticks, but in theory works with all.

Seems to be an issue with FarmersDelight: vectorwing/FarmersDelight#363

You need to upgrade that mod within the modpack