Heart rate stops recording during intense exercise

[ScooperSC]

I'm a new customer and have had the Fitbit Inspire HR for a little over 2 weeks.

Often, during interval training, the heartrate tracking just stops. It's so frustrating to finish a 30, 40, 50+ minute HIIT session at maximum effort, then see on the app that the Fitbit has tracked maybe 10 minutes and predicts quite low calorie burn. 

I've tried restarting the device, cleaning it regularly, wearing it tighter and higher up my wrist so it doesn't move, but still have this intermittent problem. 

I've been concerned about the calorie counter in general - I am an active 26-year old (run or HIIT daily for 30-60 minutes, plus walking), and rarely does my calorie count even reach 2000. But perhaps this is because the heart rate monitor works intermittently...?

I think the device might be faulty. I'd really appreciate help.

[Pedmom66]

I’m having this also with my Fitbit versa. The timer keeps going, but there’s no heart rate, it’s just blank. I have taken it off and wiped it off and also wiped my arm off. I’ve tightened my band, I’ve loosened my band, and I have moved my band. I’m very frustrated. Why would this be happening?!?!