Starting around August 10th or so, I would wake to find no respiratory rate measurement (12 out of 20 days) and \ or spikes in my RHR for the night (typically around 40 and would indicate 70+). WHOOP support chalked it up to band placement and that 5.0 is more sensitive and accurate so placement is paramount. I have worn WHOOP for over 260 days now and never experienced any issues due to placement. One inch behind my wrist may have a permanent mark from wearing constantly. They also suggested using an arm band which I did last night as I got one for exercise. Same issue - no respiratory rate and spiked RHR.
Anyone else having these types of issues? I feel that it is the device and not user based as WHOOP is making it out to be. Easy for them to take that path.