RD Pod disabled

I encounter a problem since the beginning with Fenix 5x
From time to time, the RDPod is disabled when Instart a course avtivity. So if I don't check, my activity will be recorder without RDPod.
I enable the sensor, it will work for 2 or more activities, and then the sensor will be disabled again.
I don't know how the sensor gets disabled.
Anyone experiencing this behavior ?