They ask for all sorts of reasons. I wouldn’t t think of it as a negative. They just want more clarification for something. My daughter got a request last year from Merced, she had no gaps, one CCC and a strong GPA. She got in, so who knows? Maybe they are trying to verify GPA if you have a high one for scholarship purposes.
I got one from UCLA and have no gap years/international classes. If a school is asking for unofficial transcripts, I would consider it more of a good thing than bad thing.
Lots of people get in. You’re not stuck at Merced, haha. BTW, my daughter did not choose Merced.
Who knows what thy ask. I don’t think it’s a negative, or necessarily a positive. In some ways it seems random. BTW, she got into UCLA, so it seems arbitrary.