Here is "first arm position" in ballet.
For jumping in ice skating, I think the idea is that this arm position helps you keep your shoulders parallel to the ice and rotating together, or something like that.
As for jumps that come out of nowhere, I don't think Alissa is capable of doing that. I think she is doing the best she can by long, deliberate approaches. It does adversely affect the choreography, but not as much as a bad under-rotation and fall.