as for food no it doesnt give hp, those are potions
hunger will kill you if you dont eat
as for bugs, you can report them or what you think you might see, but 2.0 is already in works and a bit behind
and will prolly be the final patch to the game made. to my knowledge
what seems to be the bug/issue
and by mid game you should have like 90 potions or more if you know how to save and load before looting a dead guy