Groove Agent ONE

Hi Steinberg Support Team,

I have come upon a problem with a vst plugin called groove agent one that comes with cubase pack.
the problem is that if when i move the slider that stipulated the begin or the end of the sample.
The slider start jumping at a sertane point not flowing the mouse pointer when slider is moved to destination of choice.
there was ivan a situation that after attemet of moving the slider to destination of choice the image of the sample disappears.
At this point this also hap pant to other samples loaded into other pads. (Sample disappears)

Please check this out helping me with this problem or fixing it future update,s.

Please let me now for confirmation.

Thanks Marc M.