@Ryan Thanks for making this downgrade available. Since upgrade (Deco M9 Plus), the system has become very unstable, issues observed.

1) Microsoft Teams, Google Meet etc: Calls drop within 1 minutes, call starts and then sound stops and then Teams call drops.

2) Various sites unreachable (various sites like sometimes Yahoo is unreachable. then eBay, and now Amazon.com is not reachable)

3) Slower DL speeds

4) Not able to download pictures send in iMessage (just the picture icon appears but it doesn't download), the moment you switch over to Cellular, you can download the photos.

5) When using WiFi calling, call just stuck in calling phase, never completes. 

So lot of problems since yesterday when I have upgraded. Restarted Modem, Decos, all clients multiple times but issue persists. For now I will be downgrading but if you need to collect any logs let me know and will be happy to assist. 

  @Ryan Thanks for fixing this. Went through and did the beta to get back online. The minute my M9s booted back up the tv and messages started working again no problem. My primary issue was YoutubeTV and YouTube not working, but did see occasional issues on desktop when connected to wifi. Never issues with wired that went through my switch, so was pretty quick to assume router issue, not ISP. 

Pretty unfortunate and I now turned off my auto-update. I like to get the latest security updates, but now will wait a week or two before doing it.

Thanks very much for the quick workaround and allowing a downgrade ability. 

  @Ryan 

I am really dissapointed fo this update (1.8.0), because it seems it bricked my device. My main deco had died during the weekend, while two others remain operational (flashing red). I tried to use pen to reset my main deco, but no use. My (ex)main deco just don't start, no lights, and is cold.

Surely there is no quarantee valid anymore, and I have no reason to believe that device dying isn't related to this firmware upgrade. Does TP-link cover this any way (I think they should), but if not - what is the device suggested to be bought instead. These M9 plus seems not be be available that much anymore, or they are very expensive if buying just one.

Edit: And when I reset manually using pen remaining two decos, I did "update" to 1.6.4 (that beta I assume), but I am not able update anymore, because device model cannot be selected from web interface.

  @Ryan After installing this update, I can again reach Netflix,YouTube and also Teams is again working.   Also the speed is back up to normal.