It is not unusual for early prototypes. However you don’t bring those to a demo like that. You build the prototype a couple months before the demo, then you spend a month testing everything you will demo, either fixing problems or putting them on a list of things to ensure the demo doesn’t get into. Cars are too complex to expect your early demos will work - you built those early demos early though to see what you forgot that isn’t obvious in CAD.
It is not unusual for early prototypes. However you don’t bring those to a demo like that. You build the prototype a couple months before the demo, then you spend a month testing everything you will demo, either fixing problems or putting them on a list of things to ensure the demo doesn’t get into. Cars are too complex to expect your early demos will work - you built those early demos early though to see what you forgot that isn’t obvious in CAD.