Sometimes the right most column goes away and I have to exit the game and rejoin in order to get it back. This column is the one where the tabs open such as the Chat or Journal. Since the window is gone I cannot gracefully exit the game, I have to close the browser and restart. I am using Firefox on at Win10 machine. I am running Waterdeep Dragon Heist (Summer). Also sometimes part of the journal can't be opened and I have to exit the game to recover.