[Bug]: Onesignal fails to initialize on time for Android

[joaquingrech]

What happened?

I get a null exception, using Unity 6 latest release but it happens in every single Unity 6 version as far as I know.
I put this guided from your examples on the tutorials, inside a Start method

        OneSignal.Debug.LogLevel = LogLevel.Verbose;
        OneSignal.Debug.AlertLevel = LogLevel.Fatal;
        OneSignal.ConsentRequired = false;
		OneSignal.Notifications.Clicked += _notificationOnClick;
		OneSignal.Notifications.ForegroundWillDisplay += _notificationOnDisplay;
		OneSignal.Notifications.PermissionChanged += _notificationPermissionChanged;
		OneSignal.User.PushSubscription.Changed += _pushSubscriptionChanged;
		OneSignal.User.Changed += _userStateChanged;


        // OneSignal Initialization
     //   OneSignal.Default.Initialize("xxxxx"); <-- I've also tried this, but you will get a null pointer exception when you run it on the device
        OneSignal.Initialize("xxxx");  <-- You will get a null pointer exception when you run it on the device

It looks it does not find the OneSignal.Default class or whatever it is, throwing a null exception. On previous versions of the plugin it worked fine.

The device logcat:

04-06 12:48:59.417 25651 25673 I Unity : Error initing pushmanager:System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> UnityEngine.AndroidJavaException: java.lang.ClassNotFoundException: com.onesignal.OneSignal
04-06 12:48:59.417 25651 25673 I Unity : at UnityEngine.AndroidJNISafe.CheckException () [0x00000] in <00000000000000000000000000000000>:0
04-06 12:48:59.417 25651 25673 I Unity : at UnityEngine.AndroidJNISafe.FindClass (System.String name) [0x00000] in <00000000000000000000000000000000>:0
04-06 12:48:59.417 25651 25673 I Unity : at UnityEngine.AndroidJavaClass._AndroidJavaClass (System.String className) [0x00000] in <00000000000000000000000000000000>:0
04-06 12:48:59.417 25651 25673 I Unity : at OneSignalSDK.Android.OneSignalAndroid..ctor () [0x00000] in ./Library/PackageCache/com.onesignal.unity.android@b7bd870878d9/Runtime/OneSignalAndroid.cs:53
04-06 12:48:59.417 25651 25673 I Unity : at System.Reflection.RuntimeConstructorInfo.InternalInvoke (System.Object obj, System.Object[] parameters, System.Boolean wrapExceptions) [0x00000] in <00000000000000000000000000000000>:0
04-06 12:48:59.417 25651 25673 I Unity : at OneSignalSDK.OneSignal._getDefaultInstance () [0x00000] in ./Library/PackageCache/com.onesignal.

Steps to reproduce?

Unity 6, build and run on android device.

What did you expect to happen?

It should not throw a null exception

Unity version

Unity 6 (latest)

OneSignal Unity SDK version

latest

Platform

Android

Relevant log output

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[joaquingrech]

anyone reading?