Stencil overwrites mark scene dirty on load
I had the problem for quite some time now, that my scenes always got dirty as soon as I opened them. I finally took the time to take a look what is causing it: The stencil overwrite on any shapes component auto-changes the scene at every opening.
This alone will mark the scene dirty every time it is opened. This is especially annoying when using a vcs. Only the file id and position in the .unity yaml file is changing.
Also happens for me for the gallery scene.