Hey @default320215548q8rcy, can you share the media that ended up in such an import (you can send it as a private message)? Also, let us know the workflow you followed to upload these images, the browser you used, and the device's OS so we can investigate further.
Putting it in a timeframe wouldn't be possible for us.
Until this gets sorted, can you give it a try by working on incognito/private browsing mode? Clearing the cache/cookies of the browser or using any other recommended browser might help you with this one. You can find more details here: https://helpx.adobe.com/express/system-requirements.html.