How do you trigger that sample?
• manually;
• with a trig;
• with a one-shot trig?
• if manually…it should need more investigations;
• with a trig: remember that if the Scale pattern is 1/1 the number of bars are not more than 4, so if you playback a sample slower than its original tempo (lets say here 120…the OT guessed that, right?) and you play it back at 99 bpm…then the length of the sample, instead of being 4 bars, it sounds like approx 6 bars (longer) just because you know that sample is intended to be 8 bars. So the correct approach is to stamp the original bpm value (99) in the Sample Settings (that you can reach like Subq wrote);
• if one-shot trig was used…more invetstigations needed
the weird thing is that you say that with a Static the problem is not there anymore…