I think I know how to make the AX89X to reboot. You can try to leave the router run for a couple hours or even 1 day, and then login to your router Admin GUI page via browser, as soon as you login to the router , the router have 50% chance to auto reboot.
I have been having major issue on...
This firmware version make the router randomly reboot since I upgrade it. You just need to check the log file and you will see the router reboot automatically. I just downgrade the firmware back to older version.
I was doing a simple ping test about 3 meter from the router, and I am getting random timeout on simple ping test like above on Android (Sony XZ3)
The same test done on iPhone 11 has no issue at all.
I am running the latest firmware already. Please help.