Cannot paste image from clipboard on Safari

Summary

When editing a page in Safari, users cannot publish a pasted image from clipboard.

Environment

MacOS - Safari

Steps to Reproduce

• Put an image to the clipboard (cmd+shift+control+4 on Mac),
• Edit a page in Safari
• Paste the image. (Image can be viewed on the editor)
• Click on Publish

Expected Results

The image should be displayed on the published page.

Actual Results

If the image is "large", attempting to publish the page will result in the following error

The page is too big to save. You could split into multiple pages, then use the include page macro to display the content

Furthermore, once another user publishes the same page via another browser (collaborative editing), the pasted image will be published as Broken Image.

If the image small, you'll be able to publish, but you'll see a "broken image" on the view page.

Workaround

Pasting of images from clipboard works fine on Google Chrome and Firefox.