Another day, another potential privacy issue for Facebook .

iPhone users are reporting a significant new bug in Facebook’s iOS app that turns the camera on without their permission.

Found a @facebook #security & #privacy issue. When the app is open it actively uses the camera. I found a bug in the app that lets you see the camera open behind your feed. Note that I had the camera pointed at the carpet. pic.twitter.com/B8b9oE1nbl — Joshua Maddux (@JoshuaMaddux) November 10, 2019

The bug went viral after Facebook user Joshua Maddox reported the issue, complete with video proof, on Twitter early Sunday morning. However, an earlier report of the bug goes back even further with a Nov. 2 tweet from Twitter user @neo_qa .

Today, while watching a video on @facebook, I rotated to landscape and could see the Facebook/Instagram Story UI for a split second. When rotating back to portrait, the Story camera/UI opened entirely. A little worrying... pic.twitter.com/7lVHHGedGf — DFC (@neo_qa) November 2, 2019

The bug appears to activate the camera after a user opens a photo or video in fullscreen within the Facebook app. Upon closing the media or swiping it offscreen, the Facebook app interface noticeably shifts to the right of the screen. Clearly open behind the app is the backfacing iPhone camera.

a bug in Facebook for iPhone forces open your camera after you click on a photo or video in the app if you’re on the latest version of iOS 13. nice. pic.twitter.com/9SD4T8zRCv — Matt Binder (@MattBinder) November 12, 2019

Mashable was able to replicate the bug with the latest Facebook app, version 246, installed on the latest version of iOS (13.2.2) on an iPhone 6S.

My first attempt at trying to recreate the bug failed as I had not previously given the Facebook app permission to use my camera, so revoking those permissions appear to be a temporary privacy fix. The app did, however, still attempt to open the camera.

In a later tweet, Maddox confirmed he tested the camera issue on multiple iPhones. It appears that the Facebook bug does not affect iPhone users with iOS 12. TheNextWeb said that it could not be replicated on a device using iOS 13.1.

Other users have posted recordings of their experiences with the Facebook camera bug.

The big question on social media: Is the bug that the camera is opening in the first place? Or is it that the screen is shifting, meaning the Facebook app normally has the camera open in the background?

Mashable reached out to Facebook for comment and to confirm this is indeed a bug (which appears to be the case, but honestly who knows anymore?). We will update this post when we hear back.

Whether it's the Cambridge Analytica scandal that rocked Facebook last year or the breach just last week where as many as 100 third-party developers were able to improperly access user data, the social media company doesn't have the greatest track record when it comes to user privacy. Here’s hoping Facebook at least fixes the bug soon.

UPDATE: Nov. 12, 2019, 2:31 p.m. ET Facebook VP of Integrity Guy Rosen provided an update on the issue on Twitter. He notes that it is a bug and a fix will be pushed out to the App Store today.

UPDATE: Nov. 14, 2019, 10:09 p.m. AEDT A new update of the Facebook app with a fix for this bug is now available on the App Store.

We’re submitting a fix for this to the App Store today. — Guy Rosen (@guyro) November 12, 2019

Facebook also provided Mashable with the following statement: