A newly leaked screenshot shows new Windows 10 Redstone Build 14283 under internal testing. Microsoft has recently released the latest Windows 10 redstone build 14279 to Windows Insiders. The build brought many changes, improvements and fixes. Most important of all that build fixed many irritating bugs of the previous build too. Insiders are again waiting for next build for more features and fixes.
The Build 14279 has been compiled on March 05, so would have been already under testing for 3-4 days and seems to be the right candidate for release to Insiders in Fast ring. So, if everything remains good, it may well be on its way to Insiders.