mobile submenus aren’t displaying correctly

Hello, I just installed your max mega menu plugin and really love it! It looks great on the PC browser as well as on my tablet but on my mobile phone, the submenu height needs to be increased for each option. The theme that I am using is called News Magazine by Web-Dorado and it is a paid theme. I hope you are able to help with this issue.

Thanks

website: rusty.gblsolution.com