Same situation here - for some unknown reason they only offered 4.49%. We got 1.49% a couple of months ago very easily and our credit score, whatever the calculation they have did not change meaningfully.
What is somewhat worse is that we learned that yesterday, 3 weeks after our application and 1 DAY before delivery. They literally never returned our numerous call or tried to contact us in any way and we only got them out of a desperate last trial. They are either swamped by the Q3 delivery push or some are trying dirty tricks knowing how close delivery is and betting on desperation soon to bump their numbers, who knows? Of course we didn't have a backup plan. We don't want to postpone much and generate unnecessary pulls on our scores by looking elsewhere, but I'll never give a business to them after this, so we'll pay cash (so much for being a risky profile at 4.49...). This part of the Tesla survey won't be good this time.