Seems my account is bugged in "Drone Race"
Yours is the way my race works. I would say your account is fine, and for some reason hers is bugging out. Even the various youtube vids show the race like you described.
I had poison mastery before I raced, so I can’t confirm if that is reason. She could try the repair command to see if there is a problem
https://help.guildwars2.com/entries/28148006-Repairing-the-Game-Client
BTW, I know you were trying to help her, but logging on to her account is against TOS (her giving someone else log in pw etc.to another person)and could cause other problems from Anet for her.
The issue is indeed poison mastery, as confirmed by the wiki. Once she gets that the vines will no longer kill her.
As for the final ramp, I remember people complaining about dying there since release. However, I can’t remember if anyone actually solved it. Maybe searching for previous posts on that issue could help you figure it out.