A friend's son was accepted to UCLA, yay! His portal had shown the acceptance, but after he told UCLA that she had changed a high school class,
the portal is now saying, decision on hold or something like that.
Does he need to escalate this to be sure that nothing "funny" happened?
An acceptance for admission is usually worded very carefully as being contingent upon something - like successful completion of current coursework (or in the case of the UCs, the need to successfully complete the A-G requirements). I would suggest contacting the Office of Admissions for further clarification.