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
Please file a bug report, include a small Xcode project and some directions that can be used to reproduce the problem, and post the Feedback number here once you do. If you post the Feedback number here I'll check the status next time I do a sweep of forums posts where I've suggested bug reports.
Bug Reporting: How and Why? has tips on creating your bug report.