Still a problem!  My phone will not stay connected while in my bedroom. It can’t decide on connection to the kitchen or office. Both equidistant one the main router and the kitchen a beacon. 

I've definitely seen some improvement, but still lose Wifi and drop to LTE for no apparent reason once in a while. For instance I went maybe 3-4 days with no issues at all, other than it taking a while on its own to go to Wifi upon returning home (eventually it does).  However today for no reason whatsoever I found that my phone was on LTE after spending a half hour or so from one of my Eeros, which is hard wired to the main Eero and Sweetspots gives me around 400 Mpbs when testing from here. So at that point it was the same "MO" - "No internet connection" shown in settings even though my SSID was selected in the Wifi settings but it was on LTE.  Left it for a while and it did not switch back to Wifi even after say 15 minutes. So I had to toggle Wifi on/off to get it back, then it was OK.

Was seeing other start to report new dropout instances and now today I am again having them. Oddly the old trick of turning off Wi-Fi on my device and then back on doesn’t seem to be fixing it.   

This seems to have gone quiet. So I'm adding myself to the set of people having this problem.

For me it is with a brand new Eero Pro kit (aka three gen two Eeros) and an Apple iPad Mini 2, IOS 11.1.1. My Eero software is up to date. There is no hardwiring except an unmanaged hub hanging off one of the two secondary Eeros, the primary Eero's connection to my cable modem, and the primary Eero's Ethernet connection to my NAS.

The problem is dropouts in wifi connectivity - only to be reestablished in Settings/Wifi and selecting my home wifi network. The dropouts occur anytime the iPad goes to sleep more than a few seconds. Or - more specifically - it appears to drop immediately upon the iPad waking back up.

It used to also drop out when I rotated the device, or roamed around the house. Thankfully that stopped after I deselected "Ask to Join Networks" and turned off Eero's guest network, so there is only - ever - one network to choose from.

Until this problem cropped up, I was overjoyed with the performance of the Eero Pro kit, and started a thread on an audio forum to sing its praises. Unfortunately after discovering this problem (my iPad had initially been out of commission the first few days I had the Eero), I've had to retract those praises and warn the forum's prospective buyers to exercise caution before purchasing an Eero, should they have any IOS devices running version 11.0 or later.

As much as I use my iPad, I find myself forced to strongly consider returning the Eeros. It is my sincerest hope that Eero can find a solution. Soon. Very soon.

After posting the above, I've got an update. For me, it's fixed!

I'd had my iPad setup with only one SSID to chose, when I deselected “Ask to Join Networks”, and also eliminated the guest network. That eliminated drops upon rotation and upon roaming. But sleeping still killed it. Every time.

But today I went into that single SSID, where I expected to find “Forget this network”, having heard that was a solution for some. But I also found something I’ve not needed in the past, and did not realize was there: an “Auto-join” option. It was in a deselected state. Now with it selected, I cannot get my device to disconnect upon sleeping! Woo hoo!

Now it wakes up and does not even appear to have ever disconnected. Awesome! So for me, this problem is fixed.

But my only IOS 11 device is an iPad that never leaves the house. Anyone else with a more mobile IOS 11 device (like an iPhone, or iPad with cellular), there’s still could be a problem. I assume they could be temporarily fix it by changing the settings I did. But once you leave the house, you’d have to change them again. And then when you return. A bit of a PITA.

But I wanted to share my work around for any with similar problems.

For the sake of the thread: things have been perfectly stable for the last few months now.

Even on an iPhone X running 11.2 beta 3, things are working perfectly as expected.  Other people I know with eero are back to being happy campers as well.

Thanks again to eero for resolving this issue, and hopefully FT will reach primetime one day.  FWIW: I believe the KRACK WiFi vulnerability exploited a weakness in FT, so chances are it will be even longer until this feature is available to the ecosystem.

Did you read my posts @mattv ? I ask because my problems are exactly the same problem everyone else has had. And I have not problem with auto-join. To my delight, that makes the underlying problem go away. So I'm a happy camper. But that does not mean that an underlying problem does not persist. So now we get into semantics. You say "the" problem is fixed. I say "your" problem is fixed, but since there are still problems with the exact same symptoms, "the" problem is not fixed. Instead, "part" of the problem has been fixed. But not all of it.

I can back that up with a quote from Eero's tech support, after having described the same problem I documented in this thread, he revealed to me in a chat a couple of days ago. He stated:

"We do not formally have a rock solid solution however we have many Apple engineers from their dismantled router program actively seeking a solution everyday."

So unless he was pulling my leg, this is on-going.

And yes - thank you - I did reset the network settings on the iPad. Even did it with an Apple tech, and he was able to see that there was no change. I was talking to Apple, because I gather that many feel this problem is really one with IOS 11, something for Apple to fix. So I wanted to make sure it was on their radar too.

And I'll note, this thread shows a few people that appear to be experiencing problems as recently as two weeks ago. So it would not appear that all have seen a fix. So it appears to not be limited to me. Again, also evidence by the quote from the tech.