This is rather poor
I've had Pearson Pue (pronounced "poo") exams shit themselves halfway through a test more than once. Once I had to start from scratch and another it restarted about 1/3 the way through. These poor guys were working hard for such a long time and would work to have "peaked" on exam day.
It's annoying enough when you are doing a $3-500ish IT cert exam and you expect it to work, but doing some medicine degree where the costs and stakes are higher (in my view - particularly as a medical degree is a one off and high cost and I need to update my certs constantly so an exam is really just another exam) is not good enough.