Please open the two links in the private content.
On both, please choose the product color RED.
“Design I” will grey out all “impossible” product variations, “Design I (Kopie)” does not do that and tells me after selecting the rest something like: “This combination is not available”.
Why do they behave different?
Is there a maximum number of variations until the functionality switches? (Design I uses 25 variations, Design I (Kopie) uses 40 variations.)
How do I set up the theme so all products use the behavior of greying out impossible attributes?