It was an insane hassle getting the Hub to function in modem mode in liason with the router we have, are there simple diagnostics I can perform for you? We have less than 40-50 devices concurrently on the network.
At concurrent usage, I believe 3 desktop machines, a single smart-tv and obviously anything running background services (the theoretical MAXIMUM as if ALL devices were running would be 40-50). I believe there are only 22 devices acknowledged; after checking the ASUS Router app as of 15/06/2021 18:36, it states "26" devices.
Well you BQM shows fine to your router...maybe ping some other places like bbc.co.uk to see if it shows packet loss or maybe it DNS? try a PC with another DNS like 220.127.116.11, 18.104.22.168 or 22.214.171.124 and you could also ping 126.96.36.199
I've also ran constant ping tests on multiple machines (ping -t switch) on 188.8.131.52, to monitor for any excessive packet round trip times. As well as to monitor for packet loss which is non-discovered with investigation.