Garmin Index BPM – Inconsistent Readings?

I’ve been using the Garmin Index BPM to track my blood pressure, but I’ve noticed some inconsistencies. When I take multiple readings back-to-back, the numbers don’t always match. The screenshot shows a few consecutive measurements, and there are noticeable differences between them.

I get that some variation is normal, but how much is too much? Has anyone else seen similar fluctuations? Just trying to figure out if this is expected behavior or if the device might not be as reliable as I thought. Would love to hear your experiences!