Microsoft has given up on Windows 10 Mobile platform but they are committed to patching operating system with security updates and fixes till 2019. On October 28, a small group of users reported that Microsoft People app is having sync problems on Windows 10 Mobile. The problem was with non-insider builds too. The bug caused the disappearance of contacts in Windows 10 Mobile’s People app.
Microsoft addressed the issue a few days later with a small update, but the issue has arrived yet again. The server-side bug is only affecting the Windows 10 Mobile devices as the People app continues to function properly in Windows 10 PCs with same Microsoft account.
Many users including the Insiders are complaining that they are having a sync problem again with the People app. Microsoft hasn’t acknowledged the problem yet, although it seems a fairly widespread issue.
There is a fix available but it is not working for all users. To fix the bug, you can sync the contacts in Microsoft People app. It’s worth noting that resetting the Windows Phone handset won’t address this issue.
Since Microsoft has already confirmed that Windows Phone’s feature and hardware is no longer the company’s focus, and as they don’t give Windows Phone users any priority these days, don’t expect a fix anytime soon. You can, however, report this bug on the Feedback Hub and let the team know about the ongoing issues.