Hi @mariaplaying. I haven't tried this feature in a while, but this sounds like a bug to me. @Grzesiek2010, can you take a look at this one and try to reproduce it with the form at https://opendatakit.org/downloads/download-info/sample-searchandselect-form. My guess is that there is something odd about the form title/name or maybe CSVs aren't downloaded, but other media types are?
Oh, and Maria, when you get a chance, please introduce yourself here. I'd also encourage you to add a real picture as your avatar because it helps build community!