[BUG][Upload] Preview malfunctions when uploading multiple images

[Yanko-Georgiev]

I'm submitting a...

• Bug report

Current behavior

When you want to upload multiple images at once, using the React Upload Component & Events component the previews of the images flash around. Tested on multiple browsers and they all have the same bouncing effect for the image previews.

Expected behavior

Previews should display correctly

Minimal reproduction of the problem with instructions

1. Open this example in the documentation.
2. Select multiple images to upload.
3. See the previews of loading images flashing.

TicketID: 1659374