@isoneedacoffee After the change I noted, the network has been stable without any further issues.

@Tony Well, I believe I have solved this issue. I had a list of blocked Apps/Websites defined under "Parental Controls" for one user. This list was... z.moatoads.com tapestry.tapad.com Psiphon 3...

Yes, all up to date.

Help! This is driving me crazy. I had been running a 3 unit Deco M9 Plus network for over a month without issues. It had firmware version 1.2.12 (out of the box). Of course this was the version that...