Restart your wifi network, that's what I did to fix that issue
First game of session always hangs, disconnects and results in loss

I have this same exact problem. The first time i load the board it hands for about 5-10 seconds on the first game. It's very annoying and it can freeze while i'm holding a piece to make my first move.

The problem persists but I have somewhat of a workaround for those who have the same bug.
- In the menu, select "Play" (not the shortcut with time control, we don't want to start the game yet!)
- In the game select screen, alternate clicking on New Game and Games at least 20 times consecutively. This will inevitably make it hang.
- When it hangs, wait until it comes back to life (could be up to a minute)
- Try again step #2 to make sure you can do it without issue
- Click "Play" button to start your game without an automatic flag!
I wish Chess.com would provide a proper answer/fix to this!
For many days now, there is a really big problem with live chess that almost systematically makes me lose my first game of a session for no reason. After a couple (1 to 5) moves, the board and page hangs (timers are stopped and the browser tells me the page is hanging, asking to either wait or kill the page). Whatever I do, I usually end up refreshing the page to a "game abandonment" result, with me losing ELO for no reason. Couple of other facts :
How can I prevent this? It's truly not a good marketing strategy to force us to lose our first game due to your website's failure. I was considering to renew my diamond membership, but I won't do it until this is fixed, it's just too frustrating!