I have the same sheet open in a Test game on Roll20 as well as in a sheet sandbox, (my intention was to look for possible changes/improvements in an old sheet), but the two sheets are different in the respective environments. I don't understand why, as I was under the impression the sandbox should be a faithful representation of the live environment. Both are "fresh out of the box": The Live game has been just created and the official sheet assigned to it The sandbox game has been just created and linked to html/css/json freshly downloaded from GitHub Specifically, the issue seems to revolve around an element identified by ID: <div id="page-wrap"> #page-wrap { width: 1024px; } While in the sandbox the element has a width of 1024 when inspected, in the live game the element's width is unspecified. Why the difference in behaviour between the two environments? Which of the two is the correct/expected behaviour for Roll20? Should I crosspost to Bug Reports & Technical Issues ?