@ngs4282 I have Deco W6000, I did an update about 2 weeks ago and now I'm having similar issues. The thing is the connection suddenly drops for 1-5 seconds and reconnects. This happens every 5-25 minutes. Connecting directly into the modem has 0 issues. This is an issue from the last update, and now that I have narrowed down the issue, I'm trying to figure out how to solve it. Already disconnected and reconnected modem and routers in many different ways, including unplugging the power for both.

it is frustrating, and a waste of time. No idea what else to do besides a hard reset and to disable all updates going forward.

  @Tatsujin My ISP further looked into their network and resolved an issue that has resolved this. My neighbor was having the same issue I was, so I figured it was my ISPs issue.  Knock on wood it keep working.