how to turn off sliding responsive menu in wordpress responsive select menu plugin?

I am using WP Responsive Select Menu plugin in wordpress and I have responsive menu while watching the website in the mobile devices.

In my IOS based phone, the responsive menu opens automatically when I scroll the screen to left (and sometimes also when I scroll down).

I don't want the menu to load on sliding the screen to left or right. Any idea how to do that??

via Chebli Mohamed