Sense 2 won't track my HR accurately

[FacundoL]

I used to have a Versa 2 that worked wonderfully regarding HR measurement, having it contrasted against a Polar clock and manual measurement.

I upgraded to Sense 2 just to be highly dissapointed. My HR would drop from 155 to 110 during a run, then just stop showing the HR at all and some times keeping in stupid low figures like 120 while I can check from measuring my HR in mi neck to be near 169.

Sometimes it is kind of a glitch lasting less than a minutes but other days this anomaly lasts most of my training session.

I bought this clock mostly to train cardio and so far its behavior has been quite annoying.

Answers?

Moderator Edit: Clarified subject

[MarreFitbit]

Hi there, @FacundoL. Welcome to the Fitbit Community Forums. Thanks for the details provided in your post about the issue with your Sense 2. I understand how you must be feeling. 

If you haven't done so yet, I'd recommend taking a look at this help article What factors can affect my heart-rate reading on my Fitbit device? 

[EdwardMountz]

I’ve literally been dealing with this same issue to the point where I got a warranty replacement and it’s doing the same thing. It must be the firmware update or something.