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For some reason, when I select an .sks file in the navigator, the editor for the scene doesn't show up. I do see the scene hierarchy, which usually appears on the left in the editor, but the actual scene, showing the sprites, labels, etc., is entirely missing. Is there some setting that causes .sks files to not be shown that I need to change? I've updated to the newest release, and cleared out the Xcode preferences in ~/Library/Application Support/Xcode, but the problem persists.

I have a SpriteKit project that makes use of the component system provided by GameplayKit.Historically, this has worked fine. In the .sks editor, I could select a node and the component editor would show the components attached to that node. I could edit properties that are exposed with @GKInspectable, and everything was working. I made quite a few scenes with lots of components for my project.Today, I opened up my project to make some changes (in 9.0.1), and clicking on the nodes which have components on them, the component panel of the .sks editor remains blank, showing no components.If I build and run the project, it still behaves as if they are there. So the component definitions appear to be in the .sks files still - just not displayed in the editor.HOWEVER, if I make a change to the .sks file and save it, though, the changes to the components are wiped out. I can re-add components to the scene, and the new components take effect as expected, but all the components I had defined earlier are gone, and would presumably need to be re-defined.So I'm stuck. If I touch any of the scenes that have components in them, the components I had already defined are going to be lost. I could, of course, go back into all the scenes and redefine all the components, but I would rather not do this for all the scenes in my project, for obvious tedium and error-prone-ness reasons.Anyone know what might be causing this, or how to work around it?