Why isn't the product variant selection updating in my online store?

[TheSteelGallery]

So my store has many different products and variants for each product however when my customers are selecting lets say a medium - orange screen it is not updating and making them order a small black one. 

my store is at  - https://thesteelgallery.co.uk/

if anyone could take a look at it and help me out it would be seriously appreciated as we are now losing money because of this.

many thanks in advance!

[LitCommerce]

Hi @TheSteelGallery,

I tested and it works fine: https://i.imgur.com/V4tlEYr.png , https://i.imgur.com/fu6fB7q.png

Did you fix it?

You can test on another device or incognito tab, I think it will work fine.

Hope it helps!