Insiders in Dev Channel are receiving a small CU without any fixes, features, or changes. KB5004071 is the rollout that is intended to run servicing pipeline test. This cumulative update takes the insider’s version to Windows 10 21H2 21390.1000. The Foundation of this edition is ready and large-scale testing has now started.
Windows insider version gets a new update in the shape of build every weak and a complimentary release to test the servicing pipeline. This also increases the version
KB5004071 Windows 10 21390.1000 as a small update for the Insider
Through this build, Microsoft also declared that the upcoming build release will be paused. Rather, you will obtain multiple cumulative updates (CU) for several weeks staying on Windows insider build 21390. The blog says –
We have been testing our servicing pipeline with Cumulative Updates to the builds released to the Dev Channel. Each week, we would release a new build and then follow up with a Cumulative Update on top of that build before moving to the next build. However, we need to test the process of releasing multiple Cumulative Updates on top of each other on top of the same build. As a result of this, over the course of the next several weeks, our focus will be on releasing multiple Cumulative Updates on top of Build 21390. Having Insiders in the Dev Channel test will be immensely helpful, and we’ll be back to flighting normally again soon!
Till then, you will have to wait for the further build.
Source – Windows blog.