When I upload a larger file, the first seconds xenforo is displaying its upper right corner IIOIIII sandglass status. However after some time that status update stops, and the upload box is still there. Nothing happens at the chrome browsers window with the exception of a small grey increasing "48% uploading..." status message at the lower left. My guess is that some users might think something did went wrong when the signal "something is in progress, please wait". A simple solution might be to state "Larger File uploads take a while, please do wait this window will be reloaded once the upload finished".