Model: RT-AC68U A1
Flashed 27E5 from 26E4
TL;DR
5GHz wifi doesn't seem to be working, 2.4ghz is good though - reverted back to 26E4 for the time being
Longer version
3 hours ago I was running 25E8 and decided to check if the router had a new update: it did and that time, the latest version...