Uni-Meter, virual Shelly not updating the values

Hello,

I have a SmartMeter via Homeatic CCU3 in HomeAssistant integrated. It works fine. But the Battery for my solar needs a Shelly Meter.
So I installed Uni-Meter to query the Homeatic SmartMeter via the Homematic Sensor and to emulate a Shelly device.
It works so far, BUT the values are not updating in the virual Shelly device in Homeassistant. Only after a restart of Uni-Meter the value is updated once.
In the trace log of the UniMeter I can see that it updates the Value but the virtual Shelly Device does not use the new values. Any hints on what is wrong or where to look?

Homeassistant and UniMeter are Docker installations.