Got myself a 7.3" in today as well, exact same issue although it sometimes also happens when connected to Thonny (showing me the debug data I’m printing). A reset and button press on battery usually works but as soon as it wakes up and restarts it usually hangs again. I narrowed it down to graphics.update() as well, it hangs on that part without errors or timeouts, it just stays there and drains the battery. I built in steps lighting up the LEDs at the various steps (before and after network connection, downloading, etc) so I can see while on battery where it is in the code while it infrequently hangs on network it almost always is the graphics.update() code where nothing happens. Not having this work properly pretty much defeats the purpose of the device for me unfortunately. Hopefully it’s something that can be fixed.