Thank you for using my hosts lists. I appreciate feedback on this project, but I do expect you to put effort into your request. At the end of the day, this is my list and I maintain it for my usage. I'll address reasonable requests, but I cannot make everyone happy. This means you might have to whitelist a few things on your own. A list that breaks nothing is a list that blocks nothing.

• False positive?
  Yes - a few of the domains on your list are stopping Xbox One's from uploading achievement properly.

The second I unblocked these domains, the xboxes began notifying me of achievements from months ago (I have been using your list for a few months now)

Here's the domains I have it narrowed down to, I didn't check the list to see which ones arent present on your https://www.github.developerdan.com/hosts/lists/ads-and-tracking-extended.txt list.

Here are the domains, this has been crazy to track down!:

v20.events.data.microsoft.com - on your list
watson.telemetry.microsoft.com - on your list
web.vortex.data.microsoft.com - on your list
v10.events.data.microsoft.com - on your list

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Domains not on your list, but may help some sorry soul having this problem in the future DuckDuckGo'ing the solution. Make sure all these domains are allowed if you use multiple lists:

attestation.xboxlive.comcert.mgt.xboxlive.com
ctldl.windowsupdate.comdef-vef.xboxlive.com
device.auth.xboxlive.comeds.xboxlive.com
help.ui.xboxlive.comlicensing.xboxlive.commicrosoft.com
notify.xboxlive.comsettings-win.data.microsoft.com
title.auth.xboxlive.comtitle.mgt.xboxlive.com
v10.vortex-win.data.microsoft.com
www.msftncsi.com
xbox.ipv6.microsoft.com
xboxexperiencesprod.experimentation.xboxlive.com
xflight.xboxlive.comxkms.xbolive.com
xsts.auth.xboxlive.com
v20.events.data.microsoft.com
watson.telemetry.microsoft.com
web.vortex.data.microsoft.com
v10.events.data.microsoft.com