Well it's not just the Mag322. I have a Mag324w2 with exactly the same problem. Everything works OK, open up the first channel and then when I change it, the box freezes and had to be unplugged and restarted. Sometimes I get away with 2 or 3 channel changes but eventually, the box freezes. This box was excellent when I first received it. It’s been already a month like this, no solution provided.
it did worked well for a day in between. But next day after that it comes back to the same issue, even though nothing is changed in those two days.
worst experience till now with support, sent few mails and no response