This has happened a few times and is honestly extremely annoying. I have a scene (That I save everytime I change something) and nodes inside of the scene are randomly disappearing. For example, I have a kinematicbody3d and a mesh with a skeleton inside of the scene. Everything was working fine, and I placed the scene inside of the world and everything was there like normal. I click play the project, and it gives me an error. "Node not found: ZombieDogMesh/AnimationPlayer". I think huh? When I went back into the scene, the entire freaking mesh is gone. Keep in mind, I did save the scene when the mesh was there. This isnt the first time its deleted stuff inside scenes before either. I have had around 95% of a scene just get deleted on two occasions. Does anyone know why this is?