I've seen this happen on one of my playtester's systems, (it might be a mac thing?) I fixed what I thought the problem was but I guess not. Using a different browser fixed the problem, if you're up to the task. Thanks for letting me know it's still an issue!
Sorry for replying again, but if possible, please do tell me if you're using Mac and (if you have time) if the game works on a different browser. No pressure, but I want to fix this bug in the post jam update.