asus wifi disconnects but not wired


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I have an RT-AX88U running Merlin-wrt 386.7. Everyone once in a while my router will lose internet access on the wifi but not on the hard-wired ports. This is at a remote site and I can vpn into the router and pul up the gui. I can see disconnected on the gui under the network map, see the picture, and I can't ping the outside world. But nothing connected via WIfI has internet access. IF i go to the site I can see a red light for internet on top of the router. If i reboot the router it will come back just fine. this Asus Router sits behind a cable modem in non-bridge mode. I have a couple of questions.

1. Is the cable modem doing this to the router?
2. What is best to put logging on to see why this is happening?
3. any suggestions on how to solve this?

Thanks in advance.

gui showing disconnected.


ping not working.


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