The initial calibration of the blood pressure measurement with the Samsung Health monitor App went well. After about a month, the App forces you to recalibrate. Unfortunately this is impossible. You have to calibrate 3 times with an external blood pressure monitor. After the second measurement, the App blocks every time. I have tried everything. Phone rebooted and reinstalled the app. Another user with a Samsung phone also has the same problem.
I can now no longer use the blood pressure measurement on my smartwatch because the App remains blocked until it is recalibrated! The latter is therefore not possible.
Solved with new update from April 2, 2021 on Phone as well as Watch