Wow, that is a problem, sorry I misunderstood. Having a manual, the only time mine has ever done that is when I accidently over reved it, and the limiter kicked in, and like you said it falls flat on it's face.
I can only imagine that happening with an SRT, when it suddenly kicks back in violently and starts accelerating again in 2nd. That has to be rather startling. (Not mention very hard on the mechanicals and your neck.)
Have you noticed if it happens at exactly red line? I mean is that where the limit switch normally kicks in on an SRT?
I know things happen very quickly in an SRT, but have you tried lifting off the accelerator (ever so slightly) just to get it to make the 1-2 shift. I realize you shouldn't have to do that, but until the dealer admits there is a problem, or they come up with an answer, I wonder if that's not going to be your only alternative.
Good Luck.