The latest Mobile Build is too buggy for the Slow Ring
Microsoft is working on a new, more stable build of Windows 10 Mobile
You probably know that the company is distributing preview builds of Windows 10 Mobile to enthusiasts through the Windows Insider program, and Insiders can choose between Slow and Fast Rings. Setting the Update process to Slow ensures more stable builds, while Fast gives an instant access to all new builds which are often too buggy to be used on a primary device.
The current preview build is number 10080 and Microsoft has only made it available for those users who are on the Fast circle. Build 10080 turns out to have many bugs and issues, more than the bugs officially documented in the changelog.
It seems that all these problems have forced Microsoft to completely withhold build 10080 from the Slow ring. Responding to a question on Twitter, the head of the Insider program Gabriel Aul says that this build will never reach the Windows Insiders and they should wait a newer, more stable build in the coming weeks.
Of course, this upcoming build will be released first to the Fast Ring.