So, update for you - I invested in an Asus router which seems to be working well. Seeing more robust connectivity and great speeds/latency and no packet loss.
However, still getting drops from the SH5 in Modem mode. here's what we're seeing on the SH page:-
Time Priority Description
18-02-2025 11:22:57 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=
18-02-2025 11:22:57 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=a
18-02-2025 11:21:49 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC==3.1;
18-02-2025 11:21:06 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:21:06 critical 16 consecutive T3 timeouts while trying to range on upstream channel 4;CM-MAC=-QOS=1.1;CM-VER=3.1;
18-02-2025 11:20:42 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=aOS=1.1;CM-VER=3.1;
18-02-2025 11:20:23 critical No Ranging Response received - T3 time-out;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:20:09 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:20:09 warning TCS Partial Service;CM-MAC=a-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:58 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:44 critical No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=a-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:43 critical No Ranging Response received - T3 time-out;CM-MAC=CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:38 notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 19 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a7;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:31 critical No Ranging Response received - T3 time-out;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:28 critical No Maintenance Broadcasts for Ranging opportunities received - T2 time-out;CM-MAC=a;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:10 warning MDD message timeout;CM-MAC=f;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 11:19:10 critical No Ranging Response received - T3 time-out;CM-MAC=a7;CM-QOS=1.1;CM-VER=3.1;
18-02-2025 00:50:35 error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
16-02-2025 17:47:04 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=aCM-QOS=1.1;CM-VER=3.1;
16-02-2025 17:42:01 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=aCM-QOS=1.1;CM-VER=3.1;
15-02-2025 14:22:45 critical Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
15-02-2025 14:22:45 critical 16 consecutive T3 timeouts while trying to range on upstream channel 8;CM-MAC=a;CM-QOS=1.1;CM-VER=3.1;
15-02-2025 14:21:37 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=a7;CM-QOS=1.1;CM-VER=3.1;
14-02-2025 12:50:34 error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
13-02-2025 23:45:32 notice GUI Login Status - Login Success from LAN interface
13-02-2025 15:18:32 notice US profile assignment change. US Chan ID: 6; Previous Profile: 12 13; New Profile: 11 13.;CM-MAC=7;CM-QOS=1.1;CM-VER=3.1;
13-02-2025 15:08:19 notice CM-STATUS message sent. Event Type Code: 5; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a7;CM-QOS=1.1;CM-VER=3.1;
13-02-2025 15:08:15 notice US profile assignment change. US Chan ID: 6; Previous Profile: 11 13; New Profile: 12 13.;CM-MAC=7;CM-QOS=1.1;CM-VER=3.1;
13-02-2025 15:08:09 notice CM-STATUS message sent. Event Type Code: 4; Chan ID: 33; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: N/A.;CM-MAC=a;CM-QOS=1.1;CM-VER=3.1;
13-02-2025 15:07:52 warning MDD message timeout;CM-MAC=a7;CM-QOS=1.1;CM-VER=3.1;
11-02-2025 00:50:32 error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=;CM-QOS=1.1;CM-VER=3.1;
10-02-2025 12:44:00 notice GUI Login Status - Login Success from LAN interface
08-02-2025 16:15:33 critical Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=aCM-QOS=1.1;CM-VER=3.1;
07-02-2025 12:50:31 error DHCP RENEW WARNING - Field invalid in response v4 option;CM-MAC=aCM-QOS=1.1;CM-VER=3.1;
06-02-2025 23:45:00 notice GUI Login Status - Login Success from LAN interface
06-02-2025 19:30:19 notice GUI Login Status - Login Success from LAN interface