Wow!😱
I just called the UCI admissions office and they were not nice AT ALL. I asked what "on hold" meant and this woman jsut said "hold please." And then Another womna picked up and said, "This is Carla," and I asked her and she was silent and said, "It means what it says." Like, duh! "On hold" tells me nothing!
Anyway, on hold means you might get an interview. You weren't bad enough to reject, not good enough to interview right away. It is by no means an interview guarantee ('maybe' was the word Ms. Carla used herself).
Take care and good luck,
Alison