I just got my new iPhone 15 and I have noticed that while taking I just got my new iPhone 15 and I have noticed that while taking photos under the bright lights of my garage, landscape 16:9 photos under the bright lights of my garage, this artifact black bars appear on the photos. If I turn the lights off, it stops! Apple Support said they have a record of several people reporting this issue and they have the engineers working the problem.
Ok. No idea then. Phone under warranty still. Get it replaced (repeatedly if necessary) until you don’t have the issue.
That would be the only recommendation for next steps