Hi @Jiri !
Sorry for the late response, I was away this week.
Indeed, BAM came to setup a new cable and re-locate the main connector as shown in the picture below. So far we haven't experienced any internet dropouts or modem reboots, also I can see that the Downstream errors are reduced drastically.
So I think I would be safe to say that the issue with the whole installation is finally solved!
many thanks to everyone involved in solving this 🙂
small remark: The green cable was replaced by the white cable.

Network Status


