Authentication box pops up even though authentication is OK

[neilyoung]

Description of the issue.

Steps to reproduce the bug or crash issues(It would be great if you can provide this)
No crash

Crash logs (If you can find it, it would be very helpful)
No logs

DJI Android SDK version you are using (Like Android SDK 3.4, etc)
4.9

DJI Product you are using (Like Phantom 4, Mavic Pro, etc)
Mavic Pro

Android system version you are using (Like Android 6.0.1, Android 5.1.1, etc)
Android 8.1

Android device you are using (Like Samsung Galaxy Note 5, Nexus 5, etc)
Nexus 6P

Android Studio version you are using (Like Android Studio 2.2, etc)
3.4

I have this issue from time to time, not always: The app launches and an incomplete credential dialog pops up, whereas the authentication has already been finished successfully. Clicking aside closes the box and the "OPEN" button is accessible.

See screenshot.