Condition is not working on file uploader

Hey there, I want to show the file uploader and some other fields only if a certain condition is met.
But it doesn′t work for the file uploader (neither the normal one nor the file uploader 2.0). If I activate the condition, the other fields (text fields) are shown and hidden the right way, but the file uploader doesnt show at all.
When I remove the condition for the uploader its showing. How can I fix this?