Hello, @rob-gaffney,
Thanks for your contact.
I have solved the issue for you on your site, please check back to your site now after clearing the browser cache.
To solve your issue, I have unchecked the option: “Optimize Revolution Slider” under Porto >> Theme Options >> Speed Optimization >> Revolution Slider.
Please refer to these screenshots: https://postimg.cc/sGrRcmS7 https://postimg.cc/yJy5KKSg
Best Regards,
PThemes Team.