Although the recent Insider release and now the official release of Windows 10 Mobile build 10586.29 seems to be going well for users, there are some hiccups. One recurrent theme we have seen is a small batch of those with the Lumia 950 XL not getting either the Insider release from last Friday or the current non-Insider push starting today.
Microsoft is aware of the issue and investigating, which is the good news.
Full story from the WindowsCentral blog...