I know, I'm sure the shipping process is traumatic for them, especially when they're tiny babies who think everything is out to eat them anyway.
Yeah, she should go down when she feels the need to thermo-regulate (or when she finally gets tired). My rainbow went and hid right away and didn't even poke his head out for several days, but RTBs are a little different and probably deal with stress differently. She just thinks she has to escape.
As long as the room (ambient) temp isn't too low I wouldn't worry about it too much, and trying to move her would only stress her out more. You could always try covering part of the enclosure with a dark shirt or blanket to help her feel less exposed and more secure.