RaspberryMatic-Entities not visible after Raspi-Reboot but after HA-Restart

Hey there,

I have a working setup of HomeAssistant (great software - THANK YOU!!!) with RaspberryMatic CCU (from Home Assistant RaspberryMatic Add-on) an a Raspberry Pi 4.

My Problem:
After a reboot of the Raspberry Pi (EITHER: Power off > on OR: Settings > Supervisor > System > Restart Host) all RaspberryMatic-Entities are not visible/accesible.
After Settings > HomeAssistant > Restart all RasperryMatic-Entities are visible/accesible again.

Can you help me with that?