Consistency would be helpful? Again

The Samsung kit has always been a problem. The watch is not really up to monitoring my own heart problem although the recorded data has up until now been very helpful even if the nannying is totally off. Up until the 27/6/2025 I could rely on the HRV values to give me an indication as to which mode my heart had been in over night. A morning 30BPM indicates the messy mode with a high HRV and broad spread of pulse rate over night. A 50+BPM was a good indication that there was a sinus rhythm and that was mirrored with an HRV actually in the normal band. These mornings the Watch3 would actually produce a blood pressure reading, while on other mornings I revert to the arm band just to get a value, although I am more interested in the recorded pulse rate.

Since the 27th June the HRV reading has been in the lower range all the time and I presume that some software update has changed just how it processes the recordings? Would be nice to be told when ones ongoing monitoring is going to be screwed up? Anyway on the 26 HRV was an excellent 588ms, well above normal! On the 28th it dropped to 66ms and 'Needs attention', which had been normal when for a few days my heart has been giving a reasonable sinus rhythm. Today my HRV is a 'Fair' 109ms, but the overnight log has a number of gaps in the recording and the sleep analysis is even more of a mess than usual. Ideally I need a more reliable method of monitoring this as I HAVE established that I get a better nights sleep while my heart is in sinus rhythm, something that has been rare for a number of years, but which I have had a few weeks of in the first six months of this year! Propblem is I do not know what to 'keep doing' to maintain it, and it drops back to messy at a whim ...