I got my allocation and TYD invite a few weeks back - originally my lock was 10/21. Yesterday I got the TYD invite email again and then my lock date has pushed back 4 separate times, each about a week later than the previous. Is this common?
Not uncommon - a bit surprising your lock date is moving around more, but yeah I wouldn't take TYD dates as solid at all. My start production ended up about a month after when I originally got TYD, so it's all in flux. They're figuring out the 12V battery shortage, so possible your lock date is getting moved as they get better clarity