Wow that's really bad
Obviously the suspensions have too much "give" in them, allowing the drum to move so much that it can hit the glass.
It shouldn't matter how out of balance the machine spins, it should be impossible for the drum to hit the glass, the suspension shouldn't stretch far enough for that to be able to happen.
I have noticed the AEG and Hotpoints mentioned that do this seem to have very "loose" suspensions which allow a much greater amount of movement than most machines.
I do hope they are aware of this and have sorted it in the current models.
Matt