This is just a general observation not necessarily a bug as far as i'm aware.
There's a fine line between realistic character maintenance and an inconvenience that takes away from the immersion of the game. I can drink so much fresh water then a short time later i feel thirsty again from just wandering around a village. Dropping unconscious in under an hour from dehydration when in that hour you have consumed litres of liquids is just a bit extreme.
It is also hard to judge how extreme my ailments are from just words in the chat box, the mod icon system and debug info with blood units was much more informative.
I suppose this is opinionated feedback so feel free to remove it (powers that be) if this is not the right place to put it.