When you make a fire. After that, it won't let you doing anything for a while and let the bug takes it's course. Then, the bug goes away. ( Please tell me when it is finish)
When you eat a wheat, it won't add to your starvation. I thought this was a bug.
With the fire bug, you'll get un-bugged once the fire goes out, I believe it's already known and being worked on.
With the wheat, I don't think it's actually eating the wheat, it's more harvesting the seeds.
First is fixed, second is not a bug