Wlork What I believe they said is that if a user doesn't have "change vote" permission, they can't currently vote for more than 1 option. How the extension currently works is that you vote for one option, then either vote for more (if you can) or unvote from that one and vote for another. Thus, a user without "change vote" permission can only vote for that first option in polls that allow multiple votes.
Adding a button to confirm votes would fix this, but that seems like worse UI to me. Where'd you put that button? At the bottom of a long list of poll options that people on mobile phones might miss? UX wise, I believe the current implementation is best, but that does cause issues with changing votes.
I think the "change vote" permission could be refactored into not allowing vote changes after some time, similar to editing tags. That would probably make it work without degrading the user's experience 🤔