@BMacAttack oh.. also, have "fast roaming" disabled. No idea why this is necessary, but it is. Follow this and the steps in the previous post, and multiroom music should work on your Alexa devices!

@PresidentJoker Honestly guys, This is the solution floating around the inter webs that seems to be the only thing that works - which is to set up a guest network, go on the app and only have 2.4 ghz...

Hey all, Earlier yesterday I upgraded from the AC1900 to the M9 mesh system. After several hours of re-adding all of my wireless devices under the new network, I was finally done. Until... I noticed...