Unable to drink

Sometimes after you played for a long time you can’t drink stew or potions and waste a volume of stew or potion, i don’t know the reason, maybe because of lag.

Is there a reliable repro for this one?

Not really, play for a long time (3 a 4 hours) on a laggy (20+ people) server.
It has not happened to me recent, but that’s because i stopped being a cook, but someone else who is a cook also had this problem (cook = drinking more stew = more chance this happens).