Slider text/description on mobile device

Hello Support.
I’ve been using your Ultimate Responsive Image Slider plugin and really like it. We use it as banner with the images showing a description with a link in the description’s text. It works perfect on a pc. However, the text does not display on a mobile device. I’ve view your demo on an iphone and it’s text on displays when the device is turned on it’s side. When the device is vertical, the text does not display.

Can you suggest something?

Thank you!!

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