Multi Taxomony Selection doesnt work

I understand the issue now that I see the form setup.

You are currently using product_tag for what should be four separate taxonomies, so you would need to add at least 3 more custom taxonomies.

The reason for this is that, in general, you can use a particular Taxonomy (or Category/Tags, each Taxonomy and each Custom Field) only once in the form. As suggested above, you would need to make additional custom taxonomies. This post tries to explain this a bit better (you can use a plugin to switch category terms from category to any new taxonomy that you make, so it is not so hard to do). It is a really awful preachy lecture I wrote:

https://support.searchandfilter.com/forums/topic/multiple-categories-combination/#post-55166

Sorry about the tone, but the message is right and it links to good plugins (except taxonomy switcher I think).

IF you need to get one filter change to when another is set with an option, on the General settings tab:

Set Auto Count (both settings) to ON

And then in the Form UI:

In each field set Hide Empty to ON