SOMOFF TRVZB Battery Status

Good Morning,

i have an issue with the battery status of one of my Sonoff TRVZB (Zigbee thermostatic radiator valve). It does not show the battery status. I waited for more than 24 hours but nothing changed.
grafik
It only shows a blinking % or a ?.

It´s integrated with Zigbee2mqtt.

Any ideas what to do. Three other TRVZB work as expected.

thx for your ideas
Markus