There is a bug in the current version of 1password on my iPhone: when syncing via Wifi the number of items in the main view is not updated! I use this to verify the sync was successful and I have all my data with me. After manually closing the app and opening it again it shows the correct number of entries.
1Password Version: 6.4.4
Extension Version: Not Provided
OS Version: iOS 9.3.5
Sync Type: Wifi