Speed Sensor 2 measurements stopped early

No, but it's a bit random when it happens and when not

Thanks for getting back to me.

I commute around 4km to work. Usually 0,1 - 0,3 km is tracked by the speed sensor. 1 out of 10 times the whole route is tracked.

Its useless.

I have the same issue on my indoor bike. The sensor stops after 30 seconds. Every time. . Useless

This happens to me regularly.
I contacted support and they opened a case, even exchanged the SS2 to a new one.
It still happens. And then there are weeks where everything works as expected. 

I think it often mistakes a short stop for the break and then doesn’t record anymore until the bike is long enough without movement that it totally shuts down. In my experience this happens when I stop, I don’t experience it in movement.