Sonarcloud Web API - service search does not return all fields for some projects

I am invoking the search service, with parameters the organization and the project.
For some projects it is not returning the lastAnalysisDate and revision fields, for others those fields are reported correctly.
Can you help me ?

Hey there.

If a project has never been analysed, those fields won’t be returned.

Hi Colin, thank you for your reply.
That projects has recent scans, I can view it from the project website.
However that information is not returned by the service.
Do you know why it could be ?