If my BP does not increase when I stand up, I grey out instead. So I thought that was normal.
One thing I’ve realized in the last ten years or so is that BP measurement is anything BUT precise anyway. Trying to automate it hasn’t helped. I’ve had a med tech using a machine take multiple readings in quick succession, and seen the systolic number vary by ~30 points. The superannuated metrologist in me recoils in horror at this sloppiness.