FCF dropped by $2.3ish Billion because ~45,000 Teslas were made that couldn't be sold last quarter.

At ~$50,000 per Tesla, that's perfectly in line with the ~$2.3 Billion FCF loss.

Its not a "loss" yet because Tesla likely hasn't written down the vehicle's values yet (accounting for the lower prices they have to go to try and sell these vehicles). As they account for the losses and reduce their production lines, it will lead to worse operating margins, and eventually a net-loss.

But for now, they are building up extra cars and holding them in inventory somewhere. That's cash intensive.