Post state changes aren't propagated particularly well without a reload

Original title: "Voting on comments on mobile makes them impossible to reply to"

I was just reading through and voting on a few comments in a thread that was locked between me loading the page and starting to vote, and every time I clicked "Vote" the reply button on that comment would disappear. I reloaded the page and saw a) all the reply buttons had gone and b) there was a "this thread is locked" banner at the top, but until then I had no idea what was happening.

It would be really neat if Tildes could cope a little better with things like this happening. Obviously it's not necessarily realistic for every client to keep a connection open with the server so that posts can be locked in real time, but it would be nice if behaviour in situations like this could at least be consistent – either all the reply buttons disappear and the banner appears at the top, or nothing changes at all. It's really disconcerting to have individual buttons disappearing as you're interacting with them!

I also notice that changes to page state don't get persisted across history navigation; if I click on a post, vote on it, then press back in my browser, the post doesn't appear to be voted for until I refresh the page. Is it possible to fix that too?