I hope you are well today and thank you for your question.
I could confirm the issue on your website but could not reproduce it on my website.
Please make sure that you are using the latest version of the theme and plugins on your website.
This can be due to plugin conflict on your site so please try temporarily deactivating all plugins except Unyson plugin and WpBakery page builder plugins and see whether everything works fine and then enable the plugins one by one to see which plugin is conflicting if any.