Hi,
I’m afraid this is not going to be possible, for now at least. The problem is, that ajax pagination is controlled via Elementor, and it will not take the filters to to account – even if it was working in the first place. The search basically asks Elementor to get results for a specific query, and then replaces the current display, with the new items. This can not work when Elementor triggers the loading.
I take a note on this, maybe there is some way to get around it in a future release – maybe if our plugin added a separate load more feature or something like that.