Google Search Censors Results

Since 2015, Google refuses to reverse-image search for Youtube or Facebook profile photos:
https://productforums.google.com/forum/#!msg/websearch/IHEw6M72R-U/EEfRHQyNBwAJ

You can easily prove that yourself.

Guess why?

>>2
It seems you can.

Dayem 12/22/15
Yes, same is here. I strongly believe this issue relates to some change facebook has made, but I found nothing announced about it. All I can do now is downloading and the uploading the image again to google images search, which is quite cumbersome.