Hi Dub24
When you run diagnostics on a non-running 1100/1150, you will get a Hall sensor error. If the sensor is good and you crank the motor over for a few seconds while doing diags, you don't get the error.
So, I would run the diags and crank the cold motor to ensure that the sensor is working as it should. Then, when the bike has warmed up and stalled/refuses to restart, I would repeat the diags and see whether the sensor then gives an error.
My money would be on the sensor wiring being buggered. The sensors themselves rarely fail.