Cannot open three.js editor project properly

Questions
1

I made a simple scene in https://threejs.org/editor/ saved it and when I opened it again, only the camera angle changed at first and then only after a click, one or two children of the scene appeared in the scene view, but not also in the hierarchy. I have to refresh the page to see them in the hierarchy. The biggest problem is that not all children of the scene loaded. Does anyone know why this happens?

2

I’ve just noticed that I get this error in the console when I try to open my project:

three.module.js:52726 Uncaught (in promise) 
TypeError: this.light.target.updateWorldMatrix is not a function
    at DirectionalLightHelper.update (three.module.js:52726:21)
    at new DirectionalLightHelper (three.module.js:52710:8)
    at Editor.addHelper (Editor.js:425:15)
    at Editor.js:179:10
    at DirectionalLight.traverse (three.module.js:7678:3)
    at Editor.addObject (Editor.js:173:10)
    at Editor.setScene (Editor.js:158:9)
    at Editor.fromJSON (Editor.js:679:8)
    at async onEditorCleared (Menubar.File.js:126:5)

Turns out I can’t open a project with a directional light in it (even if it is the only element added to an empty project). Is this a bug or am I missing something?