Facebook has just disclosed that around 800,000 users were impacted by a bug that silently unblocked "some" people they had blocked.
The unblocked users were not able to see content shared with the friends of those they'd been blocked by, and the bug "did not reinstate any friend connections that had been severed".
Erin Egan, Facebook's chief privacy officer, wrote in a blog post that the social network would start notifying the affected users. Which is nevertheless cold comfort to the company's vast audience that sees in this yet another bug that could chip away at trust in the company, following a similar one a few weeks ago.
Users on Facebook can "block" others as a way to prevent them from seeing posts or contacting the user on Messenger.
Mind you, they couldn't see private posts, or posts you'd only shared with your friends.
Today, the company said it had discovered a bug that, from May 29 to June 5, accidentally unblocked more than 800,000 people that Facebook and Messenger users had blocked.
"We know that the ability to block someone is important - and we'd like to apologize and explain what happened", Egan added.
Facebook says the bug is now fixed, all previously blocked users are now blocked again, and those affected will be hearing from Facebook with an encouragement to check their block list.
For the second time in less than a month, Facebook is having to alert users that their accounts may have been negatively impacted because of a bug.
Facebook replied, by saying that blocked lists comes under "associations", which are stored in pairs. It suggests that users check their blocked lists, and reassures them that the issue has now been resolved.
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