Hi Naomi-Tan! It's unlikely to be a general bug, since something so major as this would result in a flood of reports. It's likely to be a procedural error somewhere. Could you upload screenshots of the token and page settings regarding dynamic lighting for both the token and page in question? For the time being, I would suggest running all testing from private browsing windows, to eliminate browser extensions from the investigation. Also, make sure you are logging in consistently as a player in both browsers (I.e. use the launch button on the home page, not a bookmark) If you are not the creator of the game, make sure you are on the same page and looking at the same token during each launch. You can test this by loading the game simultaneously in each browser, moving your token in one, and making sure that the token echoes this move in the other.