Interrupted communication-low battery

I ride the RS200 pedals in the fall I changed the battery after the message that the battery is low on the EDGE 830. In the winter rdo riding at home I use the F7pro watch. Suddenly I began to lose connection with the watch after an hour of riding, and with the tablet on which was Zwift and BLE connection. 

Changing the battery solved the problem. But the symptom was poor connectivity, not a low battery message. 

Has anyone had the same. Because it looks like a nice bug with the battery level detection. 

It was similar with the HRM pro belt.