No, it should work. 
I’ve just had a run-through on my test site, and I’m getting some unusual results. There is a restriction where you can’t vote on your own post or comment:
However, it does seem to be getting muddled up and confusing my test user for the poster and not letting them vote/comment in some cases. I am not sure of the exact repro steps yet, but I think we should split this off into a Contribute > Bug topic to investigate further. 