It is not a bug, folks, it is a feature...

Following again a very old line of excuse.

How Facebook wanted to ‘frame’ security problems as an industrial issue,
and they do not want to be transparent on scraping issues.

See the contents of an internal mail to Belgian Data News. Problem arose in 2017, solved in 2019:

Re: https://web.static-rmg.be/if/c_fit,w_825,h_825/71b5490661375fd110383aa3612cc718.jpg

polonus