When change and save scene, it is remove from the list of scenes in the build setting.
This is the 6000.0.2f1 version.
I thought it would be a problem if I modified some options.
But even if I make a new project and test it, there is the same problem.
New contributor
TwentyThousand is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.