Just going to note that this was reported right after this was introduced. Devs mulled it over and decided it was not intended behavior, but they prefer how this works.
A search can go a long way to answering a question instead of waiting for replies. The forums have just been very active last day or so with the recent announcement of a world reset and requests for discussion.
Opinions expressed in this statement are the authors alone and in no way reflect on the game development values of the actual developers.
Drinking below 50% does not remove satiations. Eat below 50%.
Not a bug, though I agree it's convoluted and ugly.
"The psychological trials of dwellers in the last times will be equal to the physical trials of the martyrs. In order to face these trials we must be living in a different world."