Microsoft today is rolling out a fresh Windows 10 preview build for Insiders on the Fast ring. The latest update is a small build cumulative release that ticks the build number up to 17713.1002 and doesn't include any new features.
In place of new features, this build is focused on testing the servicing pipeline before it heads out to the Slow ring, Microsoft says. Given Redstone 5 is mostly feature complete at this point, with Microsoft shifting its focus to squashing bugs and ironing out performance ahead of release, this isn't too surprising to see.
There is one known issue to be aware of, however. This build breaks Windows Defender Application Guard, causing it to no longer work after installing 17713.1002.
If you're a Fast ring Insider, you should be able to grab this build now via Windows Update. Meanwhile, if you're anxious to check out the next major feature update as early as possible, Microsoft today opened up enrollment for the Skip Ahead ring in preparation for future testing.