Steps to reproduce

1.  Go to demo.magnolia-cms.com
2.  Try to upload zip file containing some images (examples here assets.zip , examples.zip , faces.zip )
3. Reference here for a screen recording of issue

.. Logs, screenshots, gifs...

Expected results

• Small size zip with few small size images could be uploaded normally

.. Justify non-trivial expectations with a link to a doc or a relevant discussion.

Actual results

• Function does not work, no error reported, no suspicious log found

Workaround

• N/A

Development notes

• Also please improve authoring UX, the screen keep loading and flicking which impacts authoring experience.