Using SE Percussion with Cakewalk by Bandlab, I found Percussion is randomizing the timing of some notes. I found it happening with the snare. Each time I play a certain midi clip, it alternates the timing of the snare where it is on the beat, then off the beat the next time, then back on again the next time. The timing is so far off that it sounds like an error. I cannot find any settings that allow me to control random timing or round robin. In the manual it looks like there are settings but maybe the settings are not included in the Essentials version. In summary, I can't use software that is randomly throwing out notes with bad timing. I won't use it again unless there is some solution.
PS. YES, all of my software is completely up to date, including Kontakt