Long running thread, this? 
Anyway, having issues here as well, on and off for some time. Have shrugged it off regularly, but its starting to be a bit of a pain! Basically, I have devices primarily running on WiFi (laptop, mobiles, tablets), together with a couple of NAS units which are wired for a home server. I'm regularly getting dropouts to the internet from all of my devices - for the wifi ones the signal stays connected to the Hub, but all items (wired and wireless) lose connection to the outside world. Possibly a dodgy hub? Logs are below.
Also, on a side note - not getting anywhere near the speeds I'm paying for? 9:30pm, and through a variety of servers on Ookla, I'm getting around 25Mbps, rather than the paid for 200? I understand its evening, its peak - but I'd still appreciate something closer to 50%, rather than 12%?
Super Hub
Sign In
Upstream
home
Router Status
Upstream
Upstream
US-1 US-2 US-3 US-4
Channel Type 2.0 2.0 2.0 2.0
Channel ID 5 4 3 2
Frequency (Hz) 53700000 25800000 32600000 39400000
Ranging Status Success Success Success Success
Modulation 16QAM 16QAM 16QAM 16QAM
Symbol Rate (Sym/sec) 5120000 5120000 5120000 5120000
Mini-Slot Size 2 2 2 2
Power Level (dBmV) 40.75 38.50 38.75 39.25
T1 Timeouts 0 0 0 0
T2 Timeouts 0 0 0 0
T3 Timeouts 1 5 0 0
T4 Timeouts 0 0 0 0
Downstream
DS-1 DS-2 DS-3 DS-4 DS-5 DS-6 DS-7 DS-8
Frequency (Hz) 203000000 211000000 219000000 227000000 235000000 243000000 251000000 259000000
Lock Status(QAM Lock/FEC Sync/MPEG Lock) Locked Locked Locked Locked Locked Locked Locked Locked
Channel ID 9 10 11 12 13 14 15 16
Modulation 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM 256QAM
Symbol Rate (Msym/sec) 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000 6.952000
Interleave Depth I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17 I=12
J=17
Power Level (dBmV) 9.07 9.34 9.09 8.89 8.89 9.02 8.97 8.78
RxMER (dB) 38.26 39.40 38.61 38.98 39.40 39.40 39.40 39.40
Pre RS Errors 15922 9075 4331 2271 320 307 292 280
Post RS Errors 282 299 299 286 311 298 287 274
27/04/2019 20:23:40 GMT 27/04/2019 20:23:40 GMT Warning (5) 66050310 Auth Success - Web login successful.
27/04/2019 06:14:48 GMT 27/04/2019 06:14:48 GMT Critical (3) 82000200 No Ranging Response received - T3 time-out
26/04/2019 03:54:05 GMT 26/04/2019 03:54:05 GMT Critical (3) 82000200 No Ranging Response received - T3 time-out
26/04/2019 03:17:57 GMT 26/04/2019 03:17:57 GMT Critical (3) 82000200 No Ranging Response received - T3 time-out
24/04/2019 23:58:35 GMT 24/04/2019 23:58:35 GMT Error (4) 68010400 DHCP REBIND WARNING - Field invalid in response
24/04/2019 23:57:54 GMT 24/04/2019 23:57:54 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:57:16 GMT 24/04/2019 23:57:16 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:56:00 GMT 24/04/2019 23:56:00 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:53:27 GMT 24/04/2019 23:53:27 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:48:21 GMT 24/04/2019 23:48:21 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:38:10 GMT 24/04/2019 23:38:10 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 23:17:49 GMT 24/04/2019 23:17:49 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 22:37:07 GMT 24/04/2019 22:37:07 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 21:15:42 GMT 24/04/2019 21:15:42 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 18:32:52 GMT 24/04/2019 18:32:52 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 13:07:12 GMT 24/04/2019 13:07:12 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
24/04/2019 02:15:51 GMT 24/04/2019 02:15:51 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
20/04/2019 18:39:28 GMT 20/04/2019 18:39:28 GMT Error (4) 68010400 DHCP REBIND WARNING - Field invalid in response
20/04/2019 18:38:34 GMT 20/04/2019 18:38:34 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4
20/04/2019 18:37:43 GMT 20/04/2019 18:37:43 GMT Error (4) 68010100 DHCP RENEW sent - No response for IPv4