Wow that fixed it. Thanks!
Sucks, I just dropped $200+ on the router because I thought it could use all the nice features for my devices. Hopefully more devices can support beamforming in the future.
I'm currently using 380.63_2 and my AC88U keeps dropping my Nest products (cameras and thermostat).
I reset the router to default before upgrading to this version as per Read-me, but noticed these issues...
-The 2.4Ghz band not visible anymore (fixed by toggling on/off in admin).
-Nest...