Has anyone noticed that the aftertouch doesn't work occasionally on the Tyros 2 keyboard but does via midi. I use my Tyros 2 in a dual keyboard set up and I noticed that when pressing harder to introduce pitch bend on a guitar voice (on the Tyros keyboard itself)it didn't seem to work. However when I pressed on my Korg (Tyros 2 as the slave) it did and does every time. On the Tyros sometimes it does sometimes it doesn't - strange.