PPOM – add file bag

Hi, I,ve got a question, maybe someone had the same problem – I use PPOM plugin in my store – but I`ve got a problem with “add file” function – when I add the button without any condition it work well but when I add it with conditions (show onliy if client choose the option) – when You click the button it cause open few popups (instead one) where You can upload the file. What can be wrong?