This is a solution if you are on xFinity Internet and have an xFinity streaming device/box. 

If your router is restarting multiple times a day and/or has the following log enteries, then this will probably work for you.

2025-02-10 07:45:10 upnp[10791]: <6> 217504 Service start
2025-02-10 07:45:10 upnp[10791]: <6> 217505 Service stop
2025-02-10 07:45:09 remote-management[10494]: <6> 282505 Service stop
2025-02-10 07:45:00 nat[9010]: <6> 211021 IPSEC ALG enabled
2025-02-10 07:45:00 nat[9010]: <6> 211021 L2TP ALG enabled
2025-02-10 07:45:00 nat[9010]: <6> 211021 PPTP ALG enabled
2025-02-10 07:45:00 nat[9010]: <6> 211021 SIP ALG enabled
2025-02-10 07:44:59 nat[9010]: <6> 211021 RTSP ALG enabled
2025-02-10 07:44:59 nat[9010]: <6> 211021 H323 ALG enabled
2025-02-10 07:44:59 nat[9010]: <6> 211021 TFTP ALG enabled
2025-02-10 07:44:59 nat[9010]: <6> 211021 FTP ALG enabled
2025-02-10 07:44:58 traffic-stats[7208]: <6> 269001 Clear all stats because time changed

SOLUTION: Unplug xFinity stream box from power and use any other streaming device.

I've tried other solutions that advised that the issue was the NTP servers, or even making a ticket to get it warrantied, but that was not the case. I've tried changing it and it works only for a little while, but shortly after it would go back to this behavior of restarting randomly. Luckily this isn't a device we use on the regular and we just have it for when guests come over that are staying in the office/bedroom.

I haven't done too much digging into why the xFinity streaming box is able to change the router's time and cause it to restart, but would like to know if anyone has done this and is willing to share their findings.