Apple dev support mentioned that the criteria for delivery changed in iOS 15, but it changed again in 15.4 (beta). I installed the beta and push notifications have been working fine ever since.

Thank you very much for your reply. I will give ASWebAuthenticationSession.Callback a try as I'm trying to keep traffic on the device.

Can you please give a brief example of how to use ASWebAuthenticationSession.Callback in the context of my question? I don't find the Apple documentation very useful and I haven't been able to find an example on the usual websites. Thank you!

I did look at that one, thanks. Can you give me a bit more with regard to flow? Here is the code I have been using that now doesn't work because of the complete URL requirement. print("(CEcoobeeAPIConnect) Requesting Flair API authorization token") // callbackUrlScheme = "com.SmartVentsTwo://auth" callbackUrlScheme = "https://com.SmartVentsTwo://auth" callbackUrlScheme = callbackUrlScheme.addingPercentEncoding(withAllowedCharacters: .urlHostAllowed)! let authURL = URL(string: "https://api.ecobee.com/authorize?response_type=code&client_id= SMART_APP_CLIENT_ID&redirect_uri=(callbackUrlScheme)&scope=smartWrite&state=SmartVentRequest") print("(CEcobeeAPIConnect) App Authorization request URL is (authURL!.absoluteString)") self.m_webAuthSession = ASWebAuthenticationSession.init(url: authURL!, callbackURLScheme: callbackUrlScheme, completionHandler: { (callBack:URL?, error:Error?) in print("(CEcoobeeAPIConnect) Ecobee API authorization token request returned, callbackURL is (String(describing: callBack))") // handle auth response …… }})

Hello, Thank you, but can you be a bit more specific please? The documentation is quite wanting and I'm not sure the parameter. You swapped my "authURL!" for "requestContext.url"... what is requestContext? I'm assuming the host: "...." is host: "https://com.SmartVentsTwo://auth"... is that correct? What igoes in "path:"? Thank you!