[geocaching] error when uploading field notes (minor problem)

When uploading several field notes, only one field notes is uploaded and I get an error message like this:

(sorry, forgot to change to english for the screenshot. The message is: "Unexpected problem. Please contact me and describe the problem. ERROR: ReturnCode: 0").

The field note get`s uploaded and deleted on my device (according to my settings). This happens for every field note as long as there are more than one to upload. Uploading only one single field note succeeds without a problem.