Out of stock product not selected and gives wrong product choice.

I have imported several products from Printful.com

Product imported today https://storeonline.link/product/organic-crop-top/
I know has one variation Size M, Colour White out of stock, see attached image “Product out of stock.png”
When the product is opened and select Size M, Colour White the selection changes to
Size XS Colour White, if the customer did not see this change they would select the wrong product.
See attached image “Wrong Product Selected.png”.

If I deactivate plug-in WooCommerce Product Variations Swatches Premium and the select via the default drop downs I get the correct product and message Out of Stock see attached image “Drop down select.png”

Amother product https://storeonline.link/product/3-4-sleeve-raglan-shirt/ was imported several days ago, has two variations out of stock but still works correctly.

Colour Heather Grey / Red Size XL and 2XL out of stock.