Happened once to me.. I'll try to repeat this one..
I came close to a container with food, right clicked on food - nothing happened as game lagged...
So i clicked to walk away and went afk.. When i came back a was about half a screen away from that container with popped up "Eat" radial menu..
I clicked it and hunger bar filled along with FEP, etc... I thought that lagged character was counted as still near the container, so clicked to move and expected him to hop back to the container, but nope - just walked as normal where he was...
Unexploitable (possibly? maybe should check with other radial-menu actions), occasional (depending on lag), but still a bug)