Wierd error - Twitter login in Unity crashes my app (but not always)!

android
crash
unity

#1

When I’m hitting my login button the standard twitter login window appears. When returning back to my app (I mean after pressing “Authorize”) my app crashes and android shows it native error dialog.
THE MAIN PART: it actually works as it should ONLY ON MY PHONE, on a few other devices that we tested login is causing a crash.
Logcat says (see the pic) that I didn’t initialize twitter, but it’s totally wrong, I have a TwitterInit script on the scene and the fact that twitter native login dialog appears is proving that it works well.
Problem is somewhere in android system configuration or in native android code, I understand nothing in both. Can someone help me?