Greetings,
I just came across a weird bug that is easily replicable.
Be low on stamina, rightclick a tree to chop it and whilst going there drink from a flask via your toolbar.
When reaching the tree the stamina is replenished again and again two ticks forward and one tick backwards (or something along the lines...it for sure looks wierd).
I'm glad I could contribute on fixxing bugs in this game.