The problem are only in real devices or in Xcode devuce simulator.
We found the solution, on iPhone X device is necesary include a new html tag,
I found it on this article.
https://webkit.org/blog/7929/designing-websites-for-iphone-x/
Now, I have a new question:
On the iPhoneX devices the form not fill al the screen. Are there any way on the theme to that?
Best Regards Kandy