Beta 9.1 - After viewing poll results, I no longer have the option to vote

Check your poll settings in the ACP (I think it's under System -> Posting & Editor). Make sure that the setting allows users to view results without voting. 

Turning on 'Users can change their vote' from that menu fixed in! Thanks for the help, @Esther E.! 

This is how it was set when it wasn't working.

Posting & Editor > Polls

Member Group

Still some weird stuff going on with it. All those settings above are enabled/always, but this is what I’m seeing in the club poll as admin.

After Show Vote Options > View Results

A refresh lets me vote again.