I've got a very odd problem, I'm getting duplicate SSID's randomly the correct secured one and then a unsecured duplicate SSID that vanishes after a few seconds but then returns, the site is running 5 access points (2 x EAP115-Wall v1 fw 5.0.4, 1 x EAP225 v3 fw 5.1.11, 1 x EAP235-Wall v1 fw 3.2.5, 1 x EAP110-Outdoor v3 fw 5.1.3)  with a local OC200 v1 fw 1.37.11, the gateway is a ER605 v1 fw 1.3.2, and two switches sg2428p v1 fw 1.1.15, sg2008 v1 fw 1.0.13, there's 3 vlans and 3 isp connections, there's also a l2tp vpn connection to another Omada network.

Does anyone have any advice or similar experience

Thank you for your