Some users said that when they viewed a video in full screen and then shrank it back, the app layout would shift slightly to the right. In the space on the left, you could see the phone's camera had been activated. CNET says it was able to replicate the issue.
Facebook says the bug was introduced when it fixed another issue -- the Facebook iOS app incorrectly launching in landscape mode -- in version 244. "We have seen no evidence of photos or video being uploaded due to this bug," a spokesperson told Engadget.
Needless to say, this doesn't help Facebook's image. The company has doubled down on its messages about privacy and security, and a bug like this could undermine the company's efforts to improve its reputation.
Facebook's full statement is below:
"We recently discovered that version 244 of the Facebook iOS app would incorrectly launch in landscape mode. In fixing that issue last week in v246 (launched on November 8th) we inadvertently introduced a bug that caused the app to partially navigate to the camera screen adjacent to News Feed when users tapped on photos. We have seen no evidence of photos or videos being uploaded due to this bug. We're submitting the fix for this to Apple today."