Sharable url NOT working

Hello, I’m trying to get my head around why the shareble urls not working.
From the main product page if you click on the first product where there are colour swatches: https://www.pbgstudio.com/shop/ I can see it points to the right url and once loaded it immediately redirects to the default colour option. Same if you just try to access the url directly it again redirect to the default option, eg: https://www.pbgstudio.com/product/clutch-mini/?attribute_pa_colour=loden goes to https://www.pbgstudio.com/product/clutch-mini/?attribute_pa_colour=canario

Thank you,
Jan

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