They lose their status when the school goes online, since they are not currently enrolled in in-person classes. They will probably have to apply to reinstate their status in order to return.
Even if those applications are likely to be accepted, dealing with immigration bureaucracy is an absolute nightmare and anyone who is even slightly an edge case is gonna go through hell.
In addition to the big risk, hassle and cost of flying back to your home country and having to find housing for an uncertain amount of time, all amid a global pandemic.
