Whatsapp not restoring photos from backup

Hi, I had to wipe my phone and I restored from iCloud (in the end what's the point of paying for it otherwise).

My whatsapp backup was 5GB including the media, however when it downloaded, all the photos older than a month show a "?" in place of the thumbnails.

I contacted whatsapp support and they say it's an issue regarding the iCloud backup... The thing is, that if I click on the question mark, it opens up blank but you can see the pictures in the small thumbnails, which makes me think not all is lost... PLEASE HELP!!

Does anybody know if I can recover my images? This is what I see: