While investigating UploadWizard behavior on mobile, I noticed that the preview functionality is pretty memory intensive, making it easily cause problems when uploading multiple images on mobile.
Every upload is read as a data url, base64 and then injected directly as the image. You have the entire transfer size, multiple times, and then the browser decodes the entire image to memory and then creates another copy scaled down etc etc.
Adding multiple images in your upload, that all have to do this, therefore quickly can fill up memory and crash the tab.