The documents portal for incoming international students doesn't account for visa applications from within the country. This has led to, at best, having our course leader address the concerns himself, and at worst, near deportation.
Speaking from personal experience, I had my CAS retracted because their systems didn't pick up that I'd done all I was told to do. They brought this snafu up with the home office and I had to have my course leader step in twice to deal with the fallout of their incompetence. In future it would behoove them to put up a system that deals with applicants from within the country, so as to fully dodge this level of negligent inaction.
It would also help to strengthen existing systems. I know we're all under pandemic stress but their mistakes nearly led me to being thrown out of the country while I was engaged in my studies because their systems failed to show that I had performed all actions necessary, and this shouldn't have happened. There need to be stronger systems in place that update faster. No prospective student should ever have to deal with that level of stress in addition to the looming pile of uni work they're already expected to be engaged in.