Meta confirmed this was an issue on their side and has implemented a fix. We're happy to share that posting to Instagram and Threads has been returning to normal over the past few hours, and we’re continuing to monitor things closely. If you have any failed posts in your queue, please retry them now and they should publish as expected.
We’re very sorry for the interruption today. We know issues like this can cause significant disruption, and we’ll continue working with third parties and within our own team to improve reliability wherever we can. Thank you for your patience.