Bug with Main Menu / Nav Bar

As of today, there is an issue with the main nav bar with the Safari browser. If you are viewing a page other than the homepage, and you hove over a nav bar item, such as About Us or Membership, a white block appears over the home button. If I deactivate Ultimate Member, it works fine. I tried deleting and reinstalling Ultimate Member, but the same issue occurs. Any help would be appreciated.

http://www.veiramedical.com

https://wordpress.org/plugins/ultimate-member/