In iOS 10.3 there was once this feature: "When a third party application invokes openURL: on a tel:/ facetime-audio:/, or facetime-audio:/
iOS displays a prompt and requires user confirmation before dialing."
This dialog confirmation was then removed again later on. Did iOS 11.4.1 reintroduce it?
I do get the dialog with 11.4.1 but I do not get the dialog with 11.4.
Strangely there's nothing mentioned about it in the release notes of 11.4.1