I’ve upgraded my AR750S to version 3.100-1126 in a clean install. All looks well so far except the issue that the 5G WiFi stops working after around 30 minutes. The network disappears from air, the 5G WiFi LED on the router goes off, but it’s still shown as active and switched on in the GUI.
I have installed same clean firmware and also minidlna, upnp, wifischeduler and samba and 5G is working ok, I also have 2 AR750 WDS-Clients attached to AR750S on 5G and no problems so far. Also 2G is working ok in WISP mode in AR750S with this last testing firmware.