User blog comment:MisterWoodhouse/Pausing UCP migrations to resolve some critical blockers/@comment-38479212-20200916035420

As I said earlier, we need custom category tracks back. Also there is a bug on VisualEditor where when you edit there's just a blank screen, but when you use "Edit source" and switch back it is fixed. Overall I think the editor is too glitchy right now, temporarily put an option to use a fork of the Legacy Editor until these issues are fixed.