Don't know if it's a bug, probably more like an annoyance. The arcade page gets refreshed when you click to load another comment page, and the game restarts. If the game doesn't have any save system the player loose all the progress.
It would be better if only the comments updated, like YouTube.
Develop games in your browser. Powerful, performant & highly capable.
It's on my todo list! Load comments with AJAX.