Hatchet Bug

I was watching a live stream, and the person was getting chicken from a deer. Then, the hatchet started flashing, and then it’s gone.
If people have seen this bug, sorry for posting, but I’ve never seen a post about this bug.

You get chicken breast from every animal you kill (not sure if you were saying it was a bug). Although my hatchet does flash and disappear every once and awhile.