Looks similar to the issue reported in MT3000 firmware 4.2.0 repeater mode 5GHz connection issue
Router in repeater mode has stopped detecting 5GHz networks sometime after the upgrade to 4.2.x - not sure when, it was definitely working in 4.1.x and I don’t use the feature often.
2GHz networks are detected, and repeater works fine.
All other devices around (phone, laptop) detect the 5GHz network and work just fine with it.
I tried various workarounds like changing WPA or channel - no luck.
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Try the beta5 firmware for your router.
Hi! GL.iNet download center lists 4.2.3r5 as latest, tried it and same problem. I’m a bit wary of jumping to 5, don’t even know if there is an image for Slate AX… if I do and something goes wrong, do you know if I would be able to downgrade?
after trying the latest beta, and downgrading back to 4.1 - still no luck
The only thing that worked was fiddling with the wifi settings until the combination of channel 48 and mode a/ac worked. No idea why though, or if it will continue working.
Upgrading to 4.2.3 release fixed the issue, no idea why, for now happy it works.