Microsoft has posted a list of what's been fixed and what known issues are in the just released Windows 10 Mobile preview 14295 build that's available for Insiders in the Fast ring.

According to Microsoft's Windows Insider head Gabriel Aul, here's what's been fixed in this build for Windows 10 Mobile:

We fixed the issue where If you reset your phone on Build 14291 and restore your phone from a backup, restore will fail to install apps from your backup's apps list leaving blank grey titles on Start. You should be able to reset your phone on this build, do a restore from a backup, and have your apps installed and restored appropriately.

We fixed an issue where new languages and keyboards were not downloading. However, there is an issue where the "reboot" UX doesn't appear in the Settings app after downloading a new language or keyboard. You will need to go to Update & security > Phone update and restart your phone manually from there for the new language and keyboard to go into effect.

Here's are the known issues with Mobile users in this build: