This is a phonegap bug, please refer to CB-5265:
You can fix this by adding
[[UIApplication sharedApplication] setStatusBarHidden:YES];
to the end of imagePickerController:didFinishPickingMediaWithInfo: which resides in CDVCamera.m
However, the above code is just a quick fix for you, didn't consider it in all-round, you should test it for yourself.
I hope this could help you!