I've had this bug a couple of times so far. Some times I'll save and quit in the middle of a day, with low stamina. Then, when I reload the save later, the stamina gauge is full up, but my character is still displaying the fatigued animation. Just to test it, I tried doing some farm tasks, and I ran out of stamina immediately. Not a huge glitch, but could be confusing if you walk away for a while.
(That said, I'm still having a lot of fun so far.)