MT-3000 5GHz Repeater won't connect (2.4GHz works)

Firmware 4.4.6
Location: US

Cannot get repeater mode to work with 5GHz at my house which has mixed-mode 5GHz/2.4GHz

Admin page just shows BSSID with the MAC address and nothing else.

It does work when I force 2.4GHz mode

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How’s the Wi-Fi congestion in your vicinity?

Wouldn’t know how to objectively evaluate that. But I live in a somewhat dense area, in an apartment building with maybe 50 units.

When I was on firmware 4.2.2 previously - which worked for a few days on 5GHz before it crapped out and wouldn’t work again. Just updated to 4.4.6 because of that.

Sadly, the few times I’ve tried using this router as a repeater while I travel has always been a mixed bag, whereas my Slate has performed almost flawlessly.

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I updated the firmware to the 4.5.0 beta
Initially, it didn’t work. Just kept switching back and forth between forced 2.4 and Auto, then it worked.

I have the same issue

Firmware: 4.5.16
OpenWrt Version: OpenWrt 21.02-SNAPSHOT r15812+885-46b6ee7ffc
Kernel Version: 5.4.211

I can not connect to a mixed network (2.4GHz + 5GHz), but it worked with a (2.4GHz)