Facebook graph api not returning all public fields

I used to call facebook page node with feed and posts edges and it return all the fields including comments ect.., but now I don't know what happen, it just return 3 fields (message, created_time and id), I'v tested it with the API explorer, postman and my app (an R package), did Facebook change something ? even in the search API it used to return the category of the page when I search for pages, but it dosent anymore..

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