My intermittent LIN-Bus A communication was solved by changing the CCM , found a used one for 600 SEK (About €55), changed it and relearned the actuators via VIDA and everything was fine

Same issue here, i had a smal oscilloscope on "LIN-Bus1" and could see the bus was doing something, (Going to 0 volts for 1-2 ms and then back up again), but no real traffic like on "LIN-Bus2" on the CCM.

The temperature was stuck on high and the windscreen fogged up, but after 20 minutes or so ...