Multi variant custom field wrong URL when "as radiolist" is enabled

[Georgios Kolomvos]

Joomla: 4.4.0
Template: Cassiopia - Default
Virtuemart: 4.2.0 (with sample data)

I have created a Multi Variant custom field. It works fine when it is shown as a dropdown list (e.g. when the option "as radiolist" is set to "No"). The same custom field is not working as expected when it is shown as a radiolist.

In order to show the problem i cloned that custom field and put both custom fields to the same father product. So when you chose one of the options from the drop down custom field then everything works fine and the child product's detail page is shown. But, when you click one of the buttons of the radiolist custom field then the page is redirected to a wrong URL that contains only the name of the option selected instead of the proper URL.

So, the bug is that same multi variant custom field is working fine as a dropdown list but it fails as a radiolist. You may test the example i have described at: https://test1.endon-gnosis.gr