Versa 2 exercise inaccurate / slow measuring HR

[wrebble]

I bought Fitbit Versa 2 over a week ago. I love it and it fits me well.

Last few days I've had a problem with HR monitor when I go for a walk. My watch does not want to register risen pulse. When I walk I get around 125-130 bpm (5-6 km/h). Sometimes, I add a little more speed and the pulse on watch still stays around 125-130, but the actual is 140-145. After few minutes, it gets it and starts counting correctly.

I tried it with running too. So basically my pulse was 125 - started running and ran for a minute or 2 - stopped - actual pulse 175, versa shows 135 - pulse starts dropping - actual was 155 and versa starts showing higher, but max 150 bpm.

I think the graph bellow illustrates better what the problem is. 
(side - BPM, down - sec / numbers are illustrative)

Basically watch does not register risen pulse for a minute or more and it will give me inaccurate data. To be fair, when I tried it with running, my watch was on "walk" exercise, but the same thing happened with walk when I speed up.

Does this have happened to anyone else before too? Does anyone know the fix? Maybe should I use "run" in exercise, even tough I am walking. When I bought the watch it was accurate and the problem came up a few days ago (I've had the watch about 10 days)

I will write about the 2 other problems I've had before, because it might be the cause / associated with current problem. One day I was "speed" walking 10 km. After half-way trough versa stopped counting HR. Then after 5 min it started counting again but pulse was 20 bpm lower on watch than actual. I cleaned and re-positioned - nothing. Then after 15 min it started counting correctly.

After that incident my versa has been "special". Once it showed my HR to be 85, when actual was 95.  On the watch the HR ticked 85-86-85-84.. and when it got that my pulse was higher it spiked from 85 to 95.

[AlvaroFitbit]

@wrebble It's nice to have you on board! Sorry for the delay in my reply.

Let me help you with your Versa 2 not accurately reading your heart rate. I suggest you clean the back of your device with cotton and rubbing alcohol and restart it. Turn the heart rate off, save and sync then turn it on save and sync again. Also check these tips to improve the heart rate reading on your device. 

Let me know how it goes.

[wrebble]

Hello.

It was not the pulse which was read wrong, but the acceleration of the pulse was read with 30-60 second delay. Deceleration delay was 3-5 seconds.

Right now the acceleration delay is not that much now and it has been around less than 10 seconds. Don't know what happened, but it is quite correct atm.

EDIT - Yes there was also problem with pulse. My bad. It is correct at the moment.