This sounds like the exact same behavior I'm experiencing on the new Evernote Web (haven't troubleshooted w/ old) on Chrome in Ubuntu Linux 16.04 LTS.
EDIT: Just wanted to add that this is a bit troubling because of how it may count against my free upload quota. I'm a recent college grad who's started getting serious about using Evernote now + would be down to support this amazing product once I can afford to.