My WLAN is set up without a running controller. I used the controller initially to configure two EAP devices, but it’s no longer active on the network. I'm using two EAPs, an EAP615 and an EAP653, both with the latest firmware.

I’m experiencing issues with devices disconnecting from the Wi-Fi, which operates on both 2.4GHz and 5GHz with a single SSID.

For example, my wife's Windows laptop works fine for about three hours before the Wi-Fi stops working, and my daughter’s iPhone regularly disconnects. Interestingly, I have the same iPhone model (iPhone 13) running iOS 17.5.1.1 and do not encounter these issues. We’ve already disabled Wi-Fi Assist on the iPhones. Despite making several changes to the network settings, I haven’t been able to resolve the issue.

Here are soem screenshots. I have no more ideas, maybe someone can help me here.