@AaronMD Is it advisable to check if the problem is occurring on the front end? When the DHCP expires, the front-end does not automatically renew or update an IP address for the ER605, suggest...

@Aviator14 Is the newly created WLAN Group applied to the EAP650? When you go to the Device details screen and select EAP650, how is the WLAN selected? Is there a management VLAN set?

@Maggo1404 Check whether this account you use is the Main administrator account.

@Dadox Try different channel on the AP. Also you can try to upgrade the CPE710 firmware version.

@AaronMD Can the problem be reproduced consistently? Does the problem only occur on one client or on all clients? How did you end up solving this problem? Reboot the router?

@JT82 Reset the switch to recover to the default settings. And try the defult admin/admin again.