I have been experiencing frequent brief loss of connection, ever since moving house (about 7 weeks ago). Frequency is irregular, anything from once or twice a day to ~10 times in a day. I've checked the hub logs and the drop-outs always coincide with RCS Partial Service, No Ranging Response received, and SYNC Timing Synchronization failure errors.
Hub 3.0 in Modem mode, with Asus RT-AC5300 router.
Area reference: 26
M350 Fibre Broadband
What I have tried so far:
Replacing the co-ax cable from wall to Hub - I was originally using the cable I brought from our previous house, but have switched to using the one I was sent in the welcome pack when we moved in. Verified that the cable is firmly pushed in all the way.
Rebooting the Hub.
Factory reset (pinhole) reset of the Hub.
My logs etc:
BQM graphs, both from today and live link - note how the recent dropouts line up with the errors in the logs below: