Since numerous weeks, I assume since iOS 9.3 Beta, I experience problems with synching my calendar, task list and contacts via iCloud. However, notes and mail work fine. However, I can sync calendar and tasks manually by opening the Calendar app, pressing "calendars" and dragging the list of all available calendars down. The described issue can be reproduced on iPhone 6 and iPad Air.
It seems that Mac computers are not affected by the problem. My Macs sync everything without any problem.
Is this a common issue among all iOS users, or is this specific to iOS 9.3 Beta, or is this something specific for me? If yes, how can I fix this problem?
Thanks for advice!