Here is the potential prognosis for balking issues not handled correctly...
The child will stop tumbling backwards.
Then the standing back handspring will stop, or the back walkover (both).
They usually stop doing flyaways (although she is not doing this yet) ....
They start running down the vault runway and balking, (front or RO entry vaults).
These are the signs and symptoms of anxiety going haywire,, Typically one balk leads to another and ends up spreading like a virus. Often it is caused by vestibular issues and sometimes by fear, but in the end it all bundles into anxiety and if not handled correctly... It ultimately ending up in a spiraling black hole of epic failure and early retirement....
Sometimes kids do get through it under pressure, but once one of the other symptoms appears it's all an uphill battle from there on... We have found it best to avoid that potential outcome by identifying the fear issue at it's infant stages, like the 2nd turn. If a child balks twice on something, we are done and working on something else, without a word said.. 9 out of 10 times the child comes in the next day and everything is forgotten. But a 3rd balk is what sets the trap in the child mind that day, and the reaction by the coach is what triggers the trap. IMO...
Again, this is just my opinion and I hope this helps someone out there....