sharing urls broken on iOS 14?

My app uses UIActivityViewController to let the user share a URL. This works normally on iOS 13.

On iOS 14, if the user selects Messages from the share sheet, the URL in Messages has been changed so that the domain is 127.0.0.1.

This doesn't happen if they choose Copy to send it to the clipboard. In that case, the URL is exactly as expected.

Is this a bug? Did I miss some new security setting?
Update: This only happens with the app's universal link URLs. Other URLs are fine.
sharing urls broken on iOS 14?
 
 
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