Facebook is rapidly fixing a glitch in its app, which opened user's phone cameras secretly as they scrolled through the site.
The glitch was discovered by, Joshua Maddux, who posted a screen recording on Twitter earlier this week.
The video showed when he clicked into a photograph on the mobile version of the site and then dragged the image down his carpet was visible in a sliver of screen on the left-hand side.
As he waves his hand in front of his camera, it becomes clear his camera is in use.
He said he found the same issue on five iPhone devices running iOS 13.2.2 but not iOS 12.
Newshub was also able to recreate the experiment.
However, the issue only occurs if you have given Facebook permission to use your camera. If this is not enabled, it appears Facebook is blocked by iOS.
Facebook addressed this issue on Wednesday morning calling it a "bug".
"We recently discovered our iOS app incorrectly launched in landscape. In fixing that last week, we inadvertently introduced a bug where the app partially navigates to the camera screen," said Vice President of product management Guy Rosen.
Rosen says there is no evidence of photos or videos being uploaded due to the bug, and he is sending a fix to the App Store for approval.
Commenters are less than convinced.
"Oh yes, we totally believe this was a 'bug'," said one man.
"I mean it's not like Facebook has a long, long history of spying on people or disregarding their basic privacy or anything."