Microsoft has issues a small fix to the latest Fast Ring build, Windows 10 Build 19608. The fix, according to Microsoft, will improve overall reliability of the OS. The update is KB4557426, and it raises the OS version to Build 19608.1006.Unfortunately, Microsoft didn't specify what exactly the KB4557426 does. If you run into an issue with the latest build, try to install it and see if the issue is resolved.
If you have configured your device to receive updates from the Fast Ring ring, open Settings - > Update & recovery and click on the Check for Updates button on the right. This will install the latest available Insider Preview of Windows 10.
As you may remember, Fast Ring builds no longer represent a specific feature update of Windows 10. So, we may or may not see the changes included in this release in the production branch in Windows 10 '20H2'.
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