S21 won't connect to second 5ghz network on Asus RT-AC3200

[bwistheone]

I just upgraded to an S21, and for some reason, it won't connect to the second 5ghz network on the RT-AC3200 (5ghz-2).. it says "wrong password" even though I know it's correct and every other device can connect properly (even my old S8)

WTF Samsung..