Here's a summary of the Windows 10 KB5058481 Release Preview update based on the Windows Report article you referenced:
Source: Windows Report Windows 10 KB5058481 Release Preview fixes Account Sync bug affecting EEA users
- Account Sync Bug Fix for EEA Users:
- Addresses an issue affecting the Windows Account Sync Consent system specifically in European Economic Area (EEA) markets.
- The bug prevented secondary accounts from being acknowledged, causing increased server load during sync attempts.
- Return of Seconds to Calendar Flyout Clock:
- Restores the display of seconds in the Calendar flyout clock—a feature previously removed.
- RichCalendar Improvements:
- Upcoming events are now displayed for 30 days (previously, only a few were shown).
- Enhanced accessibility with a description label for the weather button in the calendar interface.
- Font Display Bug Fixes:
- Fixes issues with GB18030-2022 characters that appeared incorrectly or too wide.
- Resolves problems where sample paragraphs didn’t display properly on certain systems.
- Mobile Operator & Network Compatibility:
- Updates COSA mobile operator profiles, improving carrier compatibility and network settings.
Source: Windows Report Windows 10 KB5058481 Release Preview fixes Account Sync bug affecting EEA users