Alta HR SmartTrack isn't working

[Ljack088]

My Alta HR has recently started just not automatically recording exercises where I have checked my heart rate throughout and know it should definitely be recorded. 

A couple of examples would be a solid 20 minute cardio workout, I have several long walks with the pram which usually records as bike since my hands are of course still but recently it’s just not picking it up.

All settings  are set to recognize at 10 mins. I've never had to do anything manually and it’s always just recognized the activity  right away. Could it be it’s just running it’s course as I’ve had it for 2 years?

Moderator Edit: Clarified subject

[AlejandraFitbit]

Welcome to the Community, @Ljack088.

Thanks for troubleshooting this SmartTrack issue. We've found that some customers have a better experience with SmartTrack if they try wearing their tracker on a different wrist. Because SmartTrack recognizes activities based on the continuous movement of your arms, in some cases, changing the wrist that you wear your tracker on can improve activity recognition.

Remember that if you change your wrist, you should also change your handedness setting. 

Let me know the outcome.