I don’t know about those others but what is your best bet how things are here 
Mine is 3.3.0-beta1-dev and it works just fine. So did earlier 3.2-serie. This layout issue here came out really fast after recent new version announcement.
What ever, but DiacourseHub is broken with fresh Discourse, before it was not. That is all what I know.
Edit.
I upgraded mine to 969ab0fd6e and same happened.