Battery level is wrong

[HB-F]

Hi,

after starting the module, all values are returned correctly, but after the first request after the set 60 seconds, the battery level for all battery-operated devices is returned as 0. However, a check in the Devolo interface shows that this is not correct.
I am surprised that all values are correct at the start and after the poll after 60 seconds the battery values are suddenly only returned with 0. All other values, such as the temperature from the thermostats, are still correct.

Thank you.