Ok i managed to find where it is coming from. (for us, not sue it’s the same for the pb mentioned in the first post, but seems like the same symptoms)
Short before the call to facebook.login we had a native.setActivityIndicator( true )
We remove the line and the problems was gone.
So i can reproduce this behavior in the SampleApp if we add a setActivityIndicator true.
With the plugin, the application get stuck after facebook.login() , without it’s ok.
I have no clue why removing the plugin remove the bugs. But now we know what to do to go on.
Not sure if you still need the bug report.