Many SharePoint projects uses Search Result Web Part to display data and provide refiners to further filter the result.
As usual to configure that you will drop the Search Result Web Part and provide the query to pull your data. When you test your query you will see that data is returned (if your query is correct) and you will see the result count i.e. number of results.
But when you view the result in real time you will see that the result count does not match. Search Result web part displayed less results than you were expecting.
This is because if search result web part thinks that there are some duplicate data in the results being displayed then it will automatically supress those results.
There are couple of fixes to this.
When providing the query you can click the Settings tab and select “Don’t remove duplicate option”.
2) Search Result Web Part Export and Import
You can also export your search result web part and find “TrimDuplicates”:true and change it with “TrimDuplicates”:false.
I hope you find this helpful.