Open Radar

 
Summary:
We have Smart App Banner meta tags on our web page. The app-argument url (url A) differs from the url the Smart App Banner meta tag is on (url B) though. In our apple-app-site-association file, we only have url A, not url B. The Smart App Banner does not appear in that case. Only when we add url B to the apple-app-site-association file, which we want to avoid.

Steps to Reproduce:
* Have a website https://www.mywebsite.com
* Add an apple-app-site-association file:
{
    applinks: {
        apps: [],
        details: [
            {
                appID: "my.app.id",
                paths: [
                    "/supported/url/path"
                ]
            }
        ]
    }
}
* On the web page https://www.mywebsite.com/web/only/url/path add the following meta tag:
<meta name="apple-itunes-app" content="app-id=123456789, app-argument=https://www.mywebsite.com/supported/url/path">

Expected Results:
When in Mobile Safari navigating to the website https://www.mywebsite.com/web/only/url/path, and the app is installed, the Smart App Banner should show up, and show the "Open" Button.

Actual Results:
No Smart App Banner shows up.

Interestingly, when adding "/web/only/url/path" to the apple-app-site-association file, the Smart App Banner DOES show up. But our app does not support this url as an app argument, so we cannot add this to our apple-app-site-association file. This behavior does not make any sense, we think there is a bug in Safari when it decides if the Smart App Banner should be shown.

Regression:
Tried on different iPads and iPhones with several iOS 9 versions, especially 9.3.1.