... That makes absolutely no sense. The code is still there on the page and nothing to do with it has changed. It's a pure JS/HTML thing and has nothing to do with the Unity file at all. What the crap?
It was an issue that came up through a very strange HTML editing issue that messed up the source every so slightly after we tried an inactivity switch (which didn't work) earlier in the week. It should be back to normal now.