I am able to run a particular data page (other data pages are running fine) only with tracer on. If I try to run this data page without the tracer I am not getting any results. Could this be a possible PRPC issue?
From the issue description, I understand that the particular data page is a custom page. Functionality of data page's execution does not depend on tracer. Could you share screenshots of the data page and actual behavior with and without using tracer?
I feel that right page context is not getting passed while fetching the results to the data page. And it is working fine, when the tracer is on. Can you please check whether all page details are mentioned correctly or not. If you are unable to find the root cause, then please create a SR for this issue.
From the provided screenshots, I think that data page is not correctly configured(since I cannot see all the tabs of the data page) and need to investigate on the tracer(when enabled). pxObjClass with tracer enabled is Code-Pega-List and without tracer enabled is Embed-ExpectedResults. Could you raise a Support request for this.