Continual disconnections - does this look right in any way?

The hub likely is not faulty just a bad line  

I have the Hub 4 in  router mode feeding an Asus RT-AX89X

Why router mode? 

First of all, you are not alone or going mad! I have been having the same issues since July and I too found out about these monitors, so I setup a quality monitor, and here are a few examples of when it goes wonky...

7 sept10 aug30 aug
and it could be like this for hours, up to days (I think the record is 5 days on the trot) when it happens.
I have had four (maybe 5) engineers out and they have, over their visits, replace every connector and cable between the box on the wall outside and up to the router, which was a new hub5 installed at the beggining of august. I have (apparantly) had the network people look at the connection and everything is in tolerance as is the case when the engineers called. But the issue with that is, by the time the engineers came, the issue had resolved itself so there was no issue to look at. That being said, the engineers showed me their version of this monitoring (called samknows) which showed a huge number of disconnects over the times that I have been having these issues.
All of the engineers were stumped and could see the samknows disconnections but at the time of their visit, no issues on their monitoring devices as everything was within spec, and all went away scratching their heads. I believe if (I hope its an if, not a when) it happens again that they are going to do a repull on the cable between the house and the green unti/box at the end of the street. A couple of the engineers told me that there was a house in a near street that was reporting the same as us too.
Touch wood, I havent had one for the last two weeks-ish .. but I am not sure if its been resolved or waiting to bite me in the bum when I relax over it.

If your post your upstream/downstream network stats, maybe we can deduce the problem.  The BQM suggests an upstream issue, imo.  @daveboulden

Just awaiting the upstream stats.

Might have a bit of an idea @daveboulden , whilst on the phone (mobile because the landline is useless in one of these .... issues times, cant keep a line open to get through the security checks) and in relation to my various issues, they had me do a pinhole reset at 4pm .. and I am not sure if it just happened to fix itself when this happened, or it did actually help but heres my BQ monitor for earlier...

This is not a fix by any stretch, but if it gets you back on a solid connection for a short while, it might stop you going mad.

The engineer came promptly this morning and straight away swapped out my Hub 4 for a Hub 5. It has initially been much better for about 5 hours, but just in the last hour, the packet loss is back again:

You can clearly see when the hub was swapped out at around 8:30 am. However, at 2:30pm-ish, they seem to be back. 

Upon checking the network log on the hub, it seems to coincide almost exactly with a "US Profile assignment change" (the rows in bold):

Network Log

This is rather complex.  To keep it simple, the VM end (CMTS) sees issues with upstream data integrity and sets boundaries with which the hub can work.  IUC 13 is 16QAM and most failure tolerant, IUC 12 is faster (I don't know the modulation width) and IUC 13 even faster.  The 5 minute gap between messages is standard as the CMTS takes another look at your hub's upstream data integrity.

To muddy the waters further, "IUC" stands for Interval Usage Code and that's even more complex, on which I won't elaborate.

In short, it seems that your problem lies with the upstream and your neighbours will likely have the same.

It doesnt have to be immediate neighbours as one or two of the engineers that came out to me reported the same issue for a house a couple of streets away (distance of about 300-400m as the crow would fly).

I did a pin-hole reset last night and it cleared for a little while (12am - 2am), but they have crept back in again albeit with more gaps this time. The large red block is where the hub grabbed a new IP Address while in Router mode after the reset. When I switched back to Modem mode it grabbed the old IP Address again.