media bay cubase 8.5

I have a problem very often with short samples in the media bay. Mostly it is kicks and snares, but any sample that is really short.

if I preview the sample inside the media bay it gives like a roll effect and if plays faster and faster. I have the settings for media bay to align beats to project. after a few playbacks of the sample when I press the cursor down to preview the next sample cubase freezes (but the music keeps playing).

any way to avoid this?