My sheet workers stop working half-way through the game. Reloading the browser page works, but delays the game. This does happen with different custom sheets, and I have no idea if it occurs with Roll20 sheets. I am using a customized Iron Kingdoms sheet, Chrome, and updated drivers. This also affects my player's sheets, though the effect seems to be limited each person's individual browser (if it stops on my computer, one of my player's sheet may work just fine).