Inconsistency on Inspire 3

[London78]

Hello. I just bought an Inspire 3 and it is very inconsistent when tracking heart rate and sleep and I still can’t get it to track O2 or temperature. I’ve restarted it several times and called customer service, but I’m still having issues. Should I just go ahead and exchange it and try another one? Or are these known issues with this product? I used to have an Alta HR and it was way better until it quit working. TIA

Moderator edit: clarified subject.

[ManuFitbit]

A warm welcome to the forums @London78.

Thank you for providing the details regarding your Inspire 3. Sorry to know the difficulties experienced.

While reviewing your information I've been informed that you already contacted the Support Team for further assistance with this. Since they already have details of your issue, they will let you know how to proceed. Please keep in contact with them and take a look at your inbox. 

[lmacmil]

I don't track sleep or O2 but I do see heart rate inconsistencies sometimes.  Today I went for a 2.2 mile walk at a steady, fast pace (a little over 13 min/mile).  My heart rate climbed to 143bpm in the first 90 seconds and was pretty steady for the first 18 minutes in the mid-140s.  Then over the next minute it fell into the 95 to 105bpm range and stayed there for the remaining 10 minutes of my walk.  My pace did not change but I was going very slightly downhill, though not enough, in my opinion, to result in that big a drop.  I did not have my phone with me so I couldn't see exactly where in the route it dropped.  This doesn't happen every time so I attribute it to the tracker moving around on my wrist.