I have used my Insider computer to join my Homegroup successfully for many builds. The Homegroup was started on a Windows 7 laptop and the printer is wired to the Insider tower. My laptop sees the Windows 10 tower and has printed wirelessly for a lot of builds.
But since build 10586.36 and including this one 11082.1000 all I get is Windows cannot set up a Homegroup on this computer.
If I connect my Windows 10 b.10586.29 computers wired to my printer ( 32bit & 64bit ) they have no problem joining the Homegroup and my laptop can print wirelessly.