I'm having the same issue. Especially with foraged food like mushrooms, cherries and wild onions for example. Also with fish caught with fishing rods. And rodent meat. Canned food and regular meat seems to be fine and working. I haven't tried self-farmed vegetables yet.
I'm playing multiplayer with mods.
Edit: A person I'm playing with can add ingredients to the same roast I can't add to. He put it in his inventory and can then add.
But I could first add stuff to a roast, later when I tried I, for a different roast, I couldn't add the same ingredient, self-farmed potatoes and radishes in this case.