Hi CJ,
As @brewster mentioned I’d recommend disabling Gyro sensitivity ($604=0) if you’re getting bump errors. Moving the gantry at the limits of speed can cause this to trip.
If you change your “Start From” point to “Absolute” and repeat the steps that cause the out of bounds error, do you still get the error? If so, please attach a copy of the file that’s causing this so we can take a look on our end.
The stopping without an error issue is likely USB related - what is your connection setup like. Are you using any hubs or USB extenders? They can cause issues with USB connections. You may also want to try installing the CH340 driver just in case.