I have experienced it with low-ish blood pressure. What for my PCP was so low that she would not let me leave the clinic until, measured again by the nursing assistant later, the systolic climbed high enough for the PCP to feel reassured and let me go, that same number for an urgent care doctor was fine and he told me to be happy that I do not have the opposite problem that so many people have: hypertension. Same values, different reactions.