Media Sessions API usage becomes more and more common, so it is quite nice to get proper album art. Also, calling into media session for play/pause when the website provides them is nicer than blatantly calling pause() on the player item.
It also isn't as invasive as the original implementation used to be since it doesn't manipulate the website DOM anymore.

I've been using this forever without any hickups.
I also couldn't reproduce the Bug 397684 at all and likely to have been caused by the HTML element we injected into the website throwing off some JS templating lib.

David I think said once that he could reproduce it or is running home assist, so can you check if it works for you still?