Facebook does not specify how many users or live broadcastsvideoAffected, it only said that the vulnerability only affects quite a few live videos.

Facebook has fixed the vulnerability and restored some videos, but Facebook still reminds some users that their Live videos have been permanently deleted and apologized for this.

In a statement to TechCrunch, Facebook said: "We recently discovered a technical vulnerability that will remove some people's live video from the Facebook timeline. We have fixed the problem and restored many videos of some users' timelines. Some users' videos Unable to recover, we have sent him an apology. We know that it is very important for users to leave memories on Facebook. We apologize for such mistakes."