Slowdowns for Waterdeep Dragon Heist When the Players Log-in to the Game

I'm experiencing significant lag on my end (the GM end) for Waterdeep Dragon Heist when I have players logged-in to the game.  The lag affects all aspects of the game for me (opening characters, rolling, moving tokens, etc.), but my players don't experience it.  As soon as they log out, the speed goes back to normal.  Haven't had this problem on any other Roll20 game, all with the same players. No other connection problems (i.e. my internet is fine). Any optimization hints or other suggestions?

I’ve noticed this in Chrome, but not Firefox, causing me to switch when using Roll20. 

Hello Micheal B. I'm sorry to hear that you're having issues with the site. As keithcurtis suggested, see if you have this issue in Firefox. You can also follow the full list of steps in our guide to  Solving Technical Issues . They are listed below : Step 1: Make sure to use the right browser Please check if these issues persist when using both Chrome  and  Firefox. Step 2: Ensure that there are no extensions/addons interfering with Roll20 Please disable  all  add-ons/extensions. Step 3: Clear your cache