Good day.
Some times PlayFabClientAPI.UnlockContainerItem() return not all granted items.
For example:
Title ID: 6B9C
User ID: 74A9D652594E342C
Container: Chest_basic
On playfab added all 3 items:
https://i.gyazo.com/8d9aa1e1f16acb10d6f8d5411e09462b.png
In unity only one item in result.GrantedItems. result.VirtualCurrency is null.
https://i.gyazo.com/1b76a115a030fbcb889c901be4bcad4b.png
this usually occurs with Bundles. But not always.