Slider not showing Welcome, Slide Title or Button on Mobile Devices

Hello! Our website is not showing the Welcome Title, Slide Title or, more importantly, the Button Text on mobile devices. Neither tablets or phones can see these details rendering the slide unusable to click on for links tied to it. All slide images appear, rotate and allow you to progress through them manually. An example of what we need: We have a slide called ‘How are we doing?’ and on a PC or Mac the Welcome Title, Slide Title and Button Text appear. This allows users to click on the Button to continue on to the survey. They are unable to do this using mobile devices. Most of our users use mobile devices but are unable to see the button to click on them to take the survey. Please help!