Problem with menu on mobile

Hello,

Im using OnePress its great theme, but I have a little problem with it.

I added my menu and it’s problem to navigate menu on smartphones.
I want to scroll my menu up and down but i cant do it. When i scroll up or down the side under the menu is moving not the menu… Also i cant close it, its no “X” button on smartphones.
When i open all sections of my menu, the last sections aret visible and i cant scroll down to see them.
My onepress site : https://www.sobieszefem.pl

Would be great if You help me. Have a nice day!