When having a lot of applications it is difficult to download the image/pdf of all applications one by one.
My suggestion would be to include two more buttons that would download all applications in the choosen format (a plus would be to zip them first before just downloading all of them).
I have been able to reproduce an issue that occurs when uploading a large file on a slow connection, where the nginx returns a 502, also reported by @gbc921.
Current layout is not responsive enough. Decreasing window width hides text box info and no scroll bar is added. See screenshot below as a illustration.