Been using x2go for many fedora releases.  After updating both client and server to fedora f37, I have a new problem.  I've tried multiple desktops, including xfce and lxde, and have the same symptoms.  
After starting a session, it initially works fine.  When I come back later to try to use it, it is frozen.  So I have not disconnected from the session and reconnected.  On the client side the screen was locked and then unlocked when I returned.  The client did not suspend - it is running on A/C power.

The session is frozen and completely unresponsive to input.  Disconnect/reconnect it's still frozen.  Only terminate/new session will unfreeze it.

Any suggestions?

Thanks
Neal