The product images don’t switch in the variable products

There is no problem at all. The second option HAS to be selected, because otherwise the shop does not (and can not) know which variation it is, the data is incomplete.

You can specify the default variation for any attribute (size in your case), and then the selection will work as you want it to.

@superkot,
Thank you for your answer. But I can’t understand what means “specify the default variation”? How can I do it?

In our case problem is. Moreover it worked properly before – several updates ago.
If you select the first option (colour), you will expect some changes in the product image. Visitors expect, because they have already MADE selection and should be a logical result of their action. They think the selection doesn’t work. ??

Thanks

Edit your product, open Variations tab and fill “Default form values”. You can select only that attribute which need to be pre-selected. That would be size in your case.

No, visitors have not made any selection if all attributes are not selected. Imagine global international business. You receive contact form with phone number, but no country code. You wouldnt be able to call back. Until everything is specified, no selection is made.

Thank you for help. But unfortunately it doesn’t work normally. Please look at that example.

I think you say about purchase, when every attributes should be selected. I agree with that. But before purchase visitor wants to estimate the options he has. How can he see options, if it is almost impossible?

Your example seems to be a simple product. Did you manage to find a workaround or did you solve your problem? Do you still need help?

No, I did not find a workaround, but I created the several new simple products instead of the variable one.
Thank for your reply.