Hello,
I experience the following issue on android phones. I use the Pre-resize images plugin to upload photos for my ad. But if I upload a little bit bigger pic (like 4.5MB) sometimes it gives me an error "Failed to scale" and "Upload failed". A seconds before it gives me this error, the page freezes for a little time.
The interesting thing is that if I try to upload the same picture again, it can give success.
I'm attaching photos of the defect and in the case that works fine.
For IOS or on PC with Windows, the upload is fine with these images.