Various Oven Bugs with the help of the book

Playing in my survival, I noticed several oven bugs, and I have decided to share the bug with you

 

Sorry for my bad translation, I'm using google translate

There are several bugs that I don't understand about the oven book guide

Every time I click to heat the meat from the help book, it resets the heat, as long as I have coal left in my inventory.

But when I have no coal in my inventory, it won't let me add more meat from the book guide

This is because you don't have carbon left over in your inventory, but if you have carbon stored in your inventory, it lets you add more but resets the heat

At the end of the video, there is another bug that I don't know how to explain, when you add another item more than the previous one, it returns a part of the item to your inventory