Depends on which side,It’s more like because some 12 year old in a Chinese sweat shop had a faulty pressure gauge so they couldn’t correctly fill a vapour chamber.
Pull a vacuum to the right a mount (this would be pressure reading)
Most likely they use by weight and not pressure for the water, fill a tube with liquid to the right mass, open valve let the coolant fill the chamber. (weight sensor reading issue)
If there's not enough coolant, I would assume the second one, if not evaporate condensing properly, assume the first. Although honestly both could cause the same issue .
Wonder if I still have some manufacturing slides around for that stuff.