HELP - The text in the product page button breaks in odd ways on mobile

Hi, does anyone know how to fix this issue please? The text included in the product page button breaks incorrectly on mobile - see attached screenshots - and I cannot change it from the design settings.

I want "Add to cart', "Adding...' and 'Added' to be all in one line and the button size to adapt to the length of the text.

Anyone so kind to explain what I can do?

This is the product page link:

https://www.slicegolf.co/shop/p/slice-days-organic-cotton-tee

Same but on builder tool:

https://stingray-heron-w2dc.squarespace.com/config/design/custom-css