This was apparently fixed a few times but it's still there.

How to reproduce, 2 different variants:

Example A:

1. Put egg and flour on table to make dough.
2. Flatten or microwave the dough.
3. Notice that the egg has reappeared and you can use it to make more food.

Example B:

1. Deepfry any item.
2. Eat it or grind it in a reagent grinder.
3. Notice that the original food thing has reappeared.