When launching an app from a URL, there is a distinction between whether the URL is freshly launching an app, or if it\'s resuming an app that has been put into a suspended
These steps can be followed on the device. Founded at this link.
On the simulator as suggested by Marc-Alexandre Bérubé.
cmd+shift+(hit h twice). Swipe the app up.xcrun simctl openurl booted http://yourdomain/path.