I don't know if this is intentional, but it seems that the Custom Sheet Sandbox doesn't remember the most current version of the HTML and CSS after exiting and rejoining. I have to reload my HTML and CSS files every time I launch the game. It seems to remember a version of the code, but not the most recent. The template above should look exactly like the template below, because the code hasn't changed...well, I haven't changed my code between those two rolls, anyway. To get the template below I had to reload all my files. I'm using Chrome Version 83.0.4103.116 (Official Build) (64-bit) with no extensions running.