Temporary bug in OS ?

Here's the situation:
I'm using 2000xl model.

Last time when I was working on a beat, strange thing happened with my PAD 1 (bank A only as far as I remember).
I had a kick drum assigned to PAD 1 and on PAD 2 I had a snare sound.So when I pressed PAD 1 (with full velocity) there was a kick drum as it should be, but while releasing PAD 1 snare sound from PAD 2 came in (with velocity around 50 or 60)...don't know why.
It only appeared when I pressed PAD 1 with 127 velocity.
Both pads were in NORMAL mode, there was no layering done (simultaneous play of other notes).

EDIT: To be more precise - It was like releasing PAD 1 engaged sound assigned to PAD 2 with velocity around 50 or 60.

To make sure this was something like a bug I loaded another song and there was the same situation as described above.
I didin't restart the machine though.

Today when I started my work again with the same project, there was no bug and so far everything is still ok.

So my question is - did anyone from this board had similar or the same problem with 2000xl model ?

Yeah that happens to me sometimes... I just press param, go through my programs, 1, 2, 3, 4. then get back to work, i guess it moves the sound.... ?
Peace
S II

I guess in my case restarting mpc fixed the strange problem. It didin't came back, which is good.
Thanks for the response.