CDash Server Displays Empty Submission When Uploading a Single Subproject

Hello. I am trying to submit a new subproject to an existing project from a different site at a different time. This encounters some unusual behavior on the my.cdash.org server. The panel listing different sites does show the submission results, but when we click into the build, it is empty. (Project dashboard is here.)

All log files look good to me. In the subprojects dashboard, I can see the subproject I just submitted is there, but marked as N/A. At the same time, other subproject names in the Project.xml without submissions are missing.

The only way I found to reproduce this error in the container is to submit a subproject that is not listed in the names in Project.xml. However, this is not the case on the server since we use the same Project.xml with all names every time. Another observation in the container is, when I submit one subproject, it successfully creates other subprojects even if there are no submissions related to them, as long as they are included in the Project.xml.

However, on the server, the subprojects (which are in the Project.xml but not submitted) will not be created in the subprojects panel.

My question is:

  1. If the behavior difference between the container and the server is not due to a configuration error on my part but is instead intentional by design, does that indicate that my approach (submitting different subprojects separately) is actually not supported/recommended on the server?
  2. How can I solve this issue? Any debugging suggestions would be appreciated.