Sequencer: Focus Method : None

What version are you on? I just tried with 4.17 and it worked ok for me. The repro steps you’re describing (creating a camera through that menu button), creates a spawnable camera. We had a bug previously where if you change some settings on spawnables, they wouldn’t get saved. That sounds like what you’re encountering. We did fix this recently, so I’m wondering if you’re on an older version.