Actually, I have a character who accumulated 50% provisions and then moved into a region that was not producing food but had sufficient food stored and my provisions are now at 10%. Is that a bug? I have not entered a starving region.
Its still happening, at least on EC and BT.
EC: Enter Semall (city) with 80% provisions, at full turn it becomes 60%
BT: Enter Wudenkin at today morning turn, same thing.
I must assert that none of them were starving or going hungry.