Windows 10 October 2018 Update (version 1809) was released back in October 2018 and Microsoft recently pushed the update to more customers after addressing all critical issues.
While the critical issues have been addressed and the new version of Windows 10 works fine, there is a glitch where the Action Center briefly appears on the left side before appearing on the right side.
The bug was discovered last year and Microsoft has already fixed it in Windows 10 19H1 preview builds. However, for some reasons, Microsoft hasn’t ported the fix to October 2018 Update builds.
As of Windows 10 Build 17763.316, the Action Center in Windows 10 briefly appears on the left side of the screen before appearing on the right side where it belongs. We were able to reproduce the bug on multiple PCs running Windows 10 October 2018 Update and we have also created a GIF showing off the bug in action.
As you can see in the above GIF, the Action Center sometimes opens on the left side of the screen and not on the right. The bug takes place for just second and Action Center shows up correctly on the right side of the screen in other attempts.
A new thread on Reddit also confirms that this bug exists in February 2019 version of Windows 10 October 2018 Update.
The bug has been fixed in Insider builds
As noted above, Microsoft confirmed in the changelog of Windows 10 19H1 Build 18267 that the Action Center Bug has been resolved.
“We fixed an issue where the Action Center might suddenly appear on the opposite side of the screen before appearing on the correct side,” Microsoft said in the release notes of Build 18267 for Insiders.
While the fix is available for Windows Insiders, the company hasn’t ported it back to Windows 10 version 1809. It’s not known when Microsoft plans to address the glitch in Action Center.