KB5015878 is an optional update that will not be automatically downloaded or installed on your device. Unless you manually check for updates and click the “Download and Install” button. It appears below the section “Optional updates”.
Windows 10 patch KB5015878 messes with notifications
The optional Windows 10 July 2022 Update comes with a couple of new features. For example, you can now receive important notifications when focus assist is on. For those of you who don’t know, Focus Assist is a function similar to “do not disturb mode” from your Android or iOS device, and hide annoying notifications when you want to stay focused.
Another novelty is aimed specifically at business customers. Microsoft noted that it has enabled the “restore functionality” for deployment scenarios Windows Autopilot. Likewise, the update has also improved the operating system update experience. Microsoft has also fixed an issue that causes consecutive video clip playback to fail in games.
In the updated support document, Microsoft noted that the input indicator and language bar might not appear in the notification area. The bug has also been reported in the mandatory Windows 10 KB5015807 update, but it doesn’t appear to be widespread.
Fortunately, Microsoft is aware of the reports and has already started promoting an emergency update. This resolves issues with the taskbar notification area.
According to Microsoft, only affects devices that have more than one language pack installedand mainly affects the “switcher” function in the notification area that allows you to quickly switch between input or keyboard languages.
This has been fixed with a server side update which simply disables the code change causing the problem. Since this is a server side update, it may take up to 24 hours to automatically spread to your devicesbut you can always reboot your device for the fix to take effect more quickly.