Vanish after import

[brouw139]

Thanks! All suggestions were to no avail.
I also had a massive syncing problem.
I went as far as
1. Backup
2. Switch off sync
3. Delete all content on all devices
4. Delete all app on all devices

New: on all devices log off from iCloud.
Set up on one device
Logged on to iCloud
Switched on sync

And that helped