You generally want to crush bugs that's happening on https://editor-git-next-typedream.vercel.app/ since new updates & bug fixes that haven't made it to production will be pushed there. So there might be some bugs that exist in build.typedream.com but not in editor-git-next.
The following is a flowchart you should use when you're testing editor-git-next:
There's already a template for bug report in linear. Please use that template and fill it to the best of your abilities.
Selecting Bug Report template
Oh and one more thing,
Bugs reported to linear HAVE TO be reproducible in order for them to be able to be moved frombacklogstatus totodo.