Aftertouch and sample pitch

Hey guys, I noticed that if you send aftertouch data along with your note on message from an external source (In this case the pads on the Fantom X) it causes the pitch of all the samples to change.

The speed/tempo remains the same but the pitch is different until you press play on the MPC then the samples sound normal again.

Anyone have this problem? Is there a way for the MPC to ignore this aftertouch message? Or do I have to turn it off in the Fantom (Least suitable)?

i also have this problem.. my pitch changes on my sample when i haved stopped my mpc.. and also when i press play it plays normal but after a couple of seconds it speeds up again i been having this problem for a while.. i posted a video on it still no response on whats the problem..