Testimonials slider in Chrome

I am making great progress with the theme – I currently have it at a demo domain – http://www.demo99.co.uk

However, I am finding that the testimonials slider doesn’t work well in Chrome. It runs through the cycle fine initially, but then splits in two, with one half of one testimonial and one half from another. Works fine in Firefox, Safari and IE (though I find it doesn’t work well in responsive, unless you refresh the page).

Is the problem with Chrome a known issue? If so, is there a solution?

Many thanks and regards.

Ian D