For those of you who just had FSD Beta 10.3 pushed to you this morning you probably found out that after your first drive your whole autopilot system goes haywire. (FCW when they aren't appropriate, AP disengaging constantly, ect). I played around with a few things, but finally found something that seems to have worked to fix the problem for now. Hopefully this helps some of you at least get your car back to where you can drive it normally without a FCW warning going off in your face every minute!
1. Park the car and plug it in.
2. Remove your hard drive and/or stick from the USB port
3. Turn OFF Sentry Mode and Smart Summon Standby
4. Make sure there are no Tesla apps open on anyone's phone who is linked to the car
5. Go into Safety and Security and click "Power Off."
6. Exit car, close door and do nothing else. Don't open any door, don't open the Tesla App, Do nothing!
7. Wait roughly 30 minutes. I tried waiting 5 minutes but that wasn't long enough so I did it for 30 minutes and everything was back to normal. It might not take 30 minutes, but that is what I waited.
I'd advise keeping Sentry Mode OFF until they get a fix out. I just took a drive and the FSD Beta was working great again and no more FCWs!