Thanks,

1) Here is Event Log: Note: I edited to "X" the mac addresses :

2021-4-7, 23:14:59	Critical (3)	Resetting the cable modem due to docsDevResetNow
1970-1-1, 00:00:39	Critical (3)	SYNC Timing Synchronization failure - Failed to acquire FEC framing; CM-MAC=x:X:x;X;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:42	Notice (6)	WiFi Interface [wl0] set to Channel 2 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:42	Notice (6)	WiFi Interface [wl1] set to Channel 157 (Side-Band Channel:N/A) - Reason:INIT
1970-1-1, 00:00:45	Critical (3)	No Ranging Response received - T3 time-out; CM-MAC=x:X:x;X;CMTS-MAC=x:X:x;X;CM-QOS=1.0;CM-VER=3.0;
1970-1-1, 00:00:48	Notice (6)	Overriding MDD IP initialization parameters; IP provisioning mode = IPv6
2021-4-7, 23:16:31	Error (4)	Missing BP Configuration Setting TLV Type: 17.8;CM-MAC=x:X:x;X; CMTS-MAC=x:X:x;X;CM-QOS=1.1;CM-VER=3.0;
2021-4-7, 23:16:31	Error (4)	Missing BP Configuration Setting TLV Type: 17.9;CM-MAC=x:X:x;X ; CMTS-MAC=x:X:x;X;CM-QOS=1.1;CM-VER=3.0;

Happens at exact same time every night.

2) On the setup - the spectrum TM602G is used for Telephone service - coax from wall is split (commscope SV-2G splitter) to this modem alogn with power and phone line .

& Netgear nighthawk for internet is connected to coax/power. Then WIFI to laptops, etc.

Previously I had seperate Netgear router and separate netgear modem - in JUne of 2020 - I replaced these 2 with the Netgear Nighthawk C7000V2 combo - no issues for about 8 months , only the last month or so - at exactly 12:15AM - I get this eve

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CG3000d no internet LAN 2 and 3 lghts flashing