Hi Mike,
It did not return results, because the taxonomy filters you have are for the ‘property’ custom post type, not for the listing, and the city filter had the ‘Ajax’ city selected – which does not match any listing obviously. (as listings does not have that taxonomy)
I have added an ‘All cities’ option to the filter, so initially the search will ignore that, and will be able to return the listing results: https://i.imgur.com/cvNSNsD.png
If you want the filter to be ignored by custom post types that does not have the taxonomy/custom field defined in the filter, you can turn on these options: https://i.imgur.com/VaXRbLQ.png
I hope this helps!