App enlarged on Cordova + iOS with using SafariViewController

Hello everyone.
I am fighting with a problem, but i have know idea what causes this and how to solve this.

You can find the problem in this picture :

My project is using cordova-plugin-googleplus plugin to provide sign in google on iOS device.
This plugin uses SafariViewController to show google’s OAuth page,
but it occurs some problem.

When iOS keyboard popped up and hide on SavariView,
my app is displayed abnormally like screenshots above.

Can anybody help with this problem?

Cuz i am not perfect with English, my description might be unclear.
If you need more informations plz let me know.