Hi Madhu,
The problem is some of the fields I used to get no longer come up at all. For example, when I submitted this doi:
10.1093/neuonc/noy129.009, I would get the full text receive date field, but now for the same DOI, that field no longer appears even though there is a text receive date. I've also run the queries through the R package but encountered the same issue.
Best wishes,
Farooq