So, for completeness and in case anyone else has the same symtoms:
turns out, after bying both a new logger and a new console, that it was the power supply to the console that was the problem.
While I was waiting for the new console I ordered to arrive I noticed the changing batteries in the console would pospone the freezing logger for a few days. So, when the new console arroived i tried using the power supply from the new console on the old equipment, and it completely removed the issues.
On the bright side I’m now only missing the ISS for a complete new second station
Knut