REST API - Missing abstract in submission

Software Support
1

We have a OJS 3.3.0.8 installation and have some additional “pages” showing submission informations.
Now I want to show the submissions abstract text but the API does not return the “abstract” property (as part of the publication element) as described in the REST API documentation.
https://docs.pkp.sfu.ca/dev/api/ojs/3.3#tag/Submissions/paths/~1submissions~1{submissionId}/get

Does anybody have an idea what could be wrong?

Thank you

2

Postscript:
As I have now noticed, there are more fields missing from the REST API response. In the “publication” element of the “subscription” object the “issueId”, “keywords”, “language” and “lastModified” are also missing