I’ve never heard of this. The only thing I have heard of is rescinding offers due to lack of performance (failing courses or not getting required GPA for gateway). Did she fail a course or perform below her previous standard when grades came out for first semester senior year? If she did nothing, I’d appeal.
Or was she admitted to engineering review then not admitted? If you have an older one, this is a new process for the last two years. Not everyone in engineering review gets engineering major - they compete for the last 15% of engineering majors. If they are not selected they are asked to pick an open major or go to Blinn engineering. Is that what happened?