It's been almost two weeks since we've seen a new Windows 10 Insider Preview in the Fast ring, but we're still not getting a new one just yet. Instead, Microsoft has released a cumulative update for build 17713, which brings the build number to 17713.1002.
The update will show up as KB4345215, and according to the blog post, there are no fixes. This update exists to test servicing for Slow ring builds, something that the team announced back in May at Microsoft's Build 2018 developer conference. This was meant to provide more frequent Slow ring builds, but there's only been one since then, and Redstone 5 is on the slowest pace in the Slow ring of any feature update so far.
Unfortunately, the new cumulative update does add another known issue. Windows Defender Application Guard doesn't work after installing it. Of course, this is the risk that we all take by being part of the Fast ring.
As we editorialized last month, the Slow ring is becoming something of a joke. This will be the first feature update to Windows 10 where there has been only one Slow ring build from the RS_PRERELEASE branch, before development of new features starts to wind down and it shifts to RS5_RELEASE. Hopefully, the team is working to service more Slow ring builds, and it can have more people testing these updates.