So, ran into the settlement bug again where resources appear to be missing, see screenshots.
On the first screenshot, there's a warning for Sanctuary Hills and it shows 5 people, 6 food, 0 water, 3 power, 25 defense and 3 beds.
So I fast travelled there and opened up workshop mode, see the second screenshot. This is actually correct. I've noticed this to happen on several occasions and with several settlements. And it's not just a visual thing either, settlers will leave, happiness will drop and when you enter they complain about the missing stuff, even though it's really there. 👎