Microsoft Graph search files result misses path property in parentReference

When searching files in OneDrive for Business, the path of the parentReference is empty. Is there any reason for this limitation?

Example in MS Graph explorer:

GET https://graph.microsoft.com/v1.0/me/drive/root/search(q='finance')?select=name,parentReference

snippet from result:

"value": [
        {
            "@odata.type": "#microsoft.graph.driveItem",
            "name": "CR-227 Product Overview.pptx",
            "parentReference": {
                "driveId": "b!-RIj2DuyvEyV1T4NlOaMHk8XkS_I8MdFlUCq1BlcjgmhRfAj3-Z8RY2VpuvV_tpd",
                "driveType": "business",
                "id": "01BYE5RZ6TAJHXA5GMWZB2HDLD7SNEXFFU",
                "path": "/path/to/folder" <--- THIS IS MISSING
            }
        },

I would be glad if the path is returned because I need it. Otherwise I need to add additional overhead to query for the parent's paths.