So I don't yet see the changelog for this particular build on the M9 Plus support page, but I did briefly read the changes when I performed the update. Didn't seem to be anything pertaining to my particular setup, and I was in the mood to update.

Was a real pain though. I ultimately had to reprovision the whole network from scratch because both Decos came back from their update in factory default ready to be added to a new network (blue LED light).

Since then I've noticed something particularly odd. I purchased these M9's specifically because they were the only tri-band models. However, since the update, the nodes only appears to be operating in dual-band mode. Normally in a WiFi scan on my Windows 10 device laptop or my Pixel 3XL, I would expect to see my home's SSID broadcasting on at at least 2 of the 3 frequencies as well as a hidden SSID on all three bands. However, since the update when I have done WiFi scans, I don't even see them broadcasting a hidden SSID on one of the 5GHz bands for dedicated backhaul. It appears to just be using the lower 5GHz and not bothering with the upper.

I figure this is just a glitch considering the tough time I had with them after the update. Anybody have a similar experience? Anyone from TP-Link know what might be going on?

Thanks in advance!