Why do product images glitch on mobile when changing variants?

[Kris_howes]

Product images on my website www.teamltd.com glitch on mobile.

When you choose a different variant, the image changes which is right but once you scroll back up the image jumps to first variant image. Then scrolling through the images is also gltichy.

Theme is Influence which is a Shopify 2.0 theme by Eight Themes