This is what I was referring to in my above post, and where some students I know have been contacted by the UCs to explain. If the student has a history of their writing and revisions, like in google docs, they will be fine.
Like I also told OP, I doubt the UCs or any school would contact them for a 29% AI/plagiarism score. Many original writings would show up with that level of ‘suspected’ AI/plagiarism in the inaccurate GPTZero (which is what OP used). As long as they have the history of their writing they would be fine even if queried.
It is important to note that a plagerism detector is not a AI detector. Plagerism scans for pre-written content avaliable online while AI detectors don’t. I don’t know if the UCs are just scanning for plagerism or if that includes AI. I would assume just plagerism because the amount of false positives they would get from any AI detector would be way to much for them to fully investigate.