I have an ASUS RT-BE7200 (Best Buy Version) / RT-BE88U router.
I am seeing an interesting issue for the first time. I did a dirty upgrade, but did do a reset afterwards as well and have the same problem (Considering downgrading but want advice before I do).
The router does not have an issue on regular reboot through the UI.
But if the router looses power and the modem (Arris S34) stays on, then when the router turns back on the time is out of sync (its Dec 31, 2023).
NTP sync keeps failing, and since time is incorrect, the router is unable to actually get a connection to the internet through the modem and unable to sync with NTP service going into a loop of incorrect time and no internet.
Setting the time manually over ssh does did not fix the issue.
Powering off both the modem and the router, and then turning them on at the same time did fix the problem, and the time magically gets set (I am assuming no internet on the modem on reboot somehow delays the NTP sync? not sure).
Have been able to reliably reproduce this issue twice now.
Never had this issue with the previous version of the firmware, 102.6.