Theme Basketball menu not working properly

I’m dealing with a problem in purchased theme Basketball, when I go to mobile view menu is not working properly.

As you can see on errormenu1 screen
when scroll down a bit menu work great as on screen errormenu2

Please is there any fix? Thank you.

Regards, Deny

Hey there

Please provide a link to your website if your problem is not resolved yet and I will check it out,
Most probably this is how it’s coded and if you want to change it you have to make changes in the style