Versa 2 heart rate sensor malfunctions during workout, but works fine when idle

[SawyerFTW259]

For my last birthday I received a Fitbit Versa 2, which was replacing my old Fitbit Versa.  I was expecting it to do many of the same heart rate features with improved accuracy, but I found the opposite and I was curious if there was anything I could do.  The main issue arises when I'm in the middle of a elliptical workout and sweating heavily.  My Fitbit HR goes from being 185-205 BPM to below 150, sometimes it even reads 75 or 80 BPM.  This throws off the accuracy of my calorie count and registers my workout inaccurate.  I wear the Fitbit tight around my non dominate wrist, and I make sure that the HR reader is touching my skin.  Is there any recommendations that you have for increasing the accuracy of my HR readings and allowing me to get a better read on my workout?

Moderator edit: subject for clarity 

[LiliyaFitbit]

Hi @SawyerFTW259, it's nice to see you again in our Community Forums.

Thank you for sharing the details of the issue you’re experiencing with your Versa 2. I understand how you are feeling and appreciate your efforts to resolve this. Heart-rate tracking can be affected by several factors including air temperature and device location on your arm. I recommend doing the following:

1. Restart the device: How do I restart my Fitbit device?
2. Check our complete tips to improve the accuracy of a heart-rate reading at How do I improve the accuracy of a heart-rate reading?

Let me know how it goes.