Hi,
According to your description, my understanding is that when you filter managed properties in People search results, then it doesn't return any results.
Something needs to clarify. Does all the properties not return results or some specific properties ?
If just some properties not return results, then I suggest you can check if you have set indexed for these properties and if there are valid data in the properties.


If all the properties can't be filtered, I suggest you can check if there are something wrong in the ULS logs and check if you have set up People search correctly.
More information:
How to: Set up People Search in SharePoint 2013
Thanks
Best Regards
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