Since there is no background, only the page's content and a shadow is visible during transition. Setting a white background on the Page fixes the behavior presenting a better eye candy. Consider putting background on the iOS Pages by default.

Complaints:
https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/nativescript/g2bYxSgV2nQ/N-dxpPRrEgAJ