Cooking food in furnace no longer give players xp.

Way to reproduce:

Place a furnace, put in 64 pork and 64 coals, take cooked pork after the process complete.

What should happen:

I should get some xp

What actually happen:

I get no xp.

It seens that this bug occurred when foods cannot show their name normally and this bug is not fixed completely. I don't undestand why this would happen.