Microsoft has released a new Windows 10 Mobile Build 10586.29 to Windows Insiders on the Fast Ring.
This build 10586.29 is a slight bump from current build 10586.11 and it brings a few improvements and minor bug fixes.
Here are a list of the improvements:
This latest build is also NOW available for the new Lumia 550, 950 and 950XL, including the LG Lancet.
You can read more on Windows Blog