Microsoft has released a new Windows 11 build 22518.1012 (KB5009380) to Dev Channel Insiders. The new build does not bring anything new to the table as it is a cumulative update with which the company is testing its servicing pipelines as it is often known to do.
These servicing pipeline updates are necessary in order to make sure that the builds can be served to users without any noteworthy issues or hiccups. So, in the press release, the firm only notes:
This update does not include anything new and is designed to test our servicing pipeline for builds in the Dev Channel.
Hence, all the bug fixes and improvements that were announced with the earlier released build 22518 to the Dev Channel are carried over into this. The build restored some additional context menu options, widget changes and more. You can find all the details here.
Interestingly, while there are no new changes made in this build, servicing test builds like these before have been known to break some features. For example, Windows 10 Build 21292.1010 caused issues for x64 emulation on ARM PCs.
You may find more information in the official press release linked here.