Search Page not working

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Search Page not working

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Hi,

We have custom Search Page having search on 4 columns which is displaying a table having 8 columns.

If we provide search criteria in just one of the input field, it doesn't work but when we provide values for all 4 search fields, it starts working. 

We have used reset as empty as well.

                  "source": "$source.filterCriterion",
                  "reset": "empty",
                  "auto": "always"

Could you please advise, how this can be resolved?

Thanks