[Bug]: AppsFlyer critical bug

[SnaiperoG3D]

What happened?

callback works only once with subscription false, and no data at first app install
reproduced with last version of appsflyer (6.8.4)
all works fine at 6.5.3

Steps to reproduce?

install onesignal last version.
install appsflyer last version
initialise both as in insctructions with callbacks
onesignal callback will triggered only once

What did you expect to happen?

onesignal PushSubscriptionStateChanged callback called 3 times, at last time subscribtion should be true, and userid presend

Unity version

2019.4.21f1

OneSignal Unity SDK version

3.0.4

Platform

Android

Relevant log output

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[SnaiperoG3D]

I did a downgrade to appsflyer 6.5.3 and onesignal 3.0.2 and issue still happening. Its happends time to time, there is no logic in it

[SnaiperoG3D]

I did a few tests. Without AppsFlyer initialisation all works fine. WITH AppsFlyer initialisaiton all works time to time. Sometime all fine, sometimes there is only 1 callback from OneSignal with false and no data

[SergeiEfimik]

@SnaiperoG3D, we have some problem after upgrade to 3.0+ version. We also using AppsFlyer, but issue reproduced due to "Firebase Cloud Messaging" and "Mobile Notifications". See #521, maybe it help to you.