When using a web page to upload from the camera roll. During selection everything is ok but after confirming the selection, its still possible to change the selection and if media is in a processing or downloading state its not obvious to a user what is going on. This results to a confusing user experience. It doesn't seem like theres any signal back to the page in this state, its just a poor camera roll picker which doesn't block selection changes or show any progress that something is happening (i.e. localising or processing for upload). Same result on Chrome and Safari