DHCP on the main router is turned off. Because I don't want to use the DNS assigned by the provider. In previous firmware versions, DHCP on the AX20 worked fine even in AP mode, but in the latest...

@ItsMillerTime79 In access point mode, the menu cannot be found. It works correctly in router mode, but not in access point mode.

@ItsMillerTime79 Thank you for your reply. However, I couldn't find ADVANCED SETTINGS on my model.

After updating the firmware, the DNS address set in DHCP disappears when rebooted. The DNS address disappears in Access Point Mode, but it's okay in Router Mode. Please tell me the solution.