However, others under the Reddit thread, including the original poster, said that their app's icon changed, and they are still on iOS 17, leading many to guess that it may just be a glitch.

The Facebook icon now is appearing as a black background with a blue "F," rather than the traditional white on blue, for some users.

The Facebook icon now is appearing as a black background with a blue "F," rather than the traditional white on blue, for some users.