Products Multilingual Associations stopped workinkg on frontpage

I have a site created with two languages. I created two products language associations but it stopped working on the front page. For example, on https://custom.mppstudio.pl/en/products/jancdsd130custombearfbm-en website when I change the language, I am taken to the products category site. Before I was taken to the same product with different language. I tried removing the category associations but after changing the language I am taken to the home page. This used to work before but maybe something changed after recent joomla updates or gridbox plugin update. What should I do to switch product page directly to the associated product in anather language? I will provide access to the site in the Contact Balbooa form. I set up association for JANCDSD130CUSTOMBEARFBM product.
Best regards Marcin

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