Filter show no products in Search result page

Hi,

In the search result page for example for “usb”, if i use the filter and apply … I get “no product found” even if there are plenty to show.
This problem happens just in the Search Results Page. If i use the filter in a listing page everything works fine.
Everything is up to date (WP & Plugins) I can’t recall having that problem before, but I don’t know since when the filter don’t work in the Search Results.

Thank you for your help in advance.
Crdly

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