So far, we've reproduced the problem in Chrome, but we have not tested other browsers yet.
This is a major problem for our app – we're now recommending that our customers uninstall the Evernote Web Clipper extension. Several already have.
Please fix it and release an update ASAP. If there is a workaround for our app or a way to completely block the Web Clipper extension for our site, please let me know.