Lots of connected/disconnected activity on sensor 'eBUS signal'

[MrKuip]

I have ebusd running inside HA OS with a eBUS Adapter Shield C6.
in MQTT a device 'eas' is created automatically.
In the device is the sensor 'eBUS signal'
This signal flips from connected to disconnected to connected a few times per minute.

I can set the temperature on my real thermosstate and can read values from my Vailllant Ecotec. So it all seems to be working. Except this 'eBUS signal' sensor. What is it? and what can I do to resolve this?

[DigitalOptics]

same issue