I need to correct myself: after navigating back, the click-interaction is actually alive (on the non-highlighted arrow), but useless, as it doesn't try to revoke the upvote, instead, it tries to upvote again; to which you get the message that you can't do that twice.
---> You need a page-reload to show the arrow in the correct, highlighted state; but it is then that you don't get any click-interactions any more.
---> You need a page-reload to show the arrow in the correct, highlighted state; but it is then that you don't get any click-interactions any more.