Empty Archive after Downloading Results

Quick question:
I just uploaded my experiment to pavlovia and piloted it. Fortunately it works with no Errors. I tried several test runs.
Unfortunately, when downloading the results, the zip-archive is empty.

Now, after some 40 minutes, there is at least one *.csv in the zip-archive. However there should be 3 *.csv-files (as I tested it three times- it even reads “completed= 3 (100.0%)” on pavlovia).
What is going on here? Is this expected behavior or is my experiment corrupted (I do use code components with js).
“Delete Media Results” is doing nothing as well. It still reads “completed= 3 (100.0%)”.

No data is saved online if you use to pilot option.