HRV Drastically Lower since 13.15 and Continues with Latest Updates

Same here, but with the previous firmware update. I updated to 12.27 on release day - 11 Oct. My HRV started declining a week later, and has been out of range without a single point in range since the 24th of October. As I stated in another thread, I don't know what to make of this and thought that there was something wrong with me in the beginning.

Here's another thread discussing this

And here's how my HRV Status looks in the last two months:

its been discussed - mine dropped off like a rock in the beginning of oct and there were a lot of us mentioning it.  it's doing it again. 

purtroppo il mio è lo stesso! Ho anche preso il 955 per questa funzione. Dopo la delusione della 645 mai considerata da Garmin, questa potrebbe essere la goccia che fa traboccare il vaso!

Zero problems here

I've seen a handful of users discuss it, but no acknowledgment from garmin. HRV plays a pretty large role within their training metrics and influences quite a bit, so I'm surprised. 

Purtroppo anche il mio continua a scendere. Ieri era a 26 ..... Ho provato a resettare il tutto e vediamo cosa succede.

Same here. My HRV have been consistently lower than range for the last 3 weeks even if I'm not training particularly hard and, in fact, my acute load score is in the lower part of the optimal range. These readings, together with highly inaccurate readings from HR during activities, made me switch all that off. I'd rather listen to my body.

Try hard reset, for me was the solution and now my HRV status is ok. Im using SW 14.17

Thank you. Would I lose data/history if I do a hard reset?