Unreliable Garmin Connect

Hello guys,

Just received my V3s.

I connected it to my IPhone and updated the firmware to 3.0.

Setter parameters work pretty randomly via Garmin Connect (latest version) on my IPhone 6S. Most of the time, if for example I change the crank length or activate auto zero, the V3s will disconnect for 1 second and come back pretending that the parameters are set... but they are not. If I close/reopen the app after the V3s went in sleep mode, the values are reverted back. I have to keep trying, sometimes with other Apple devices, to eventually succeed.

Am I the only one?

Thanks,
Yan