My laser level lied to me and the drywall crew laughed for 20 minutes

Last month on a job in Austin I set up a new rotary laser for a ceiling grid install. Trusted the self leveling readout instead of double checking with a manual bubble. The whole grid went up an inch low on the east side of the room. The foreman spotted it right away because the light fixtures wouldn't seat flush. We had to tear down and redo about 300 square feet of track. Turns out the sensor had a loose mount from shipping. Now I always run a quick calibration check against a known level line before I commit to any layout, even if it adds 5 minutes. Has anyone else had a brand new tool fail right out of the box?