Is anyone still using Session Drummer 3 and have you a solution to the following?

Sometimes during playback or even bouncing audio tracks, the drum track just randomly stops playing. If I stop and start, it will continue without problems. Other times when I rewind back to the start but there is no drum data to play, it starts repeating the last clip it was playing before I stopped playback. (It's not trying to play the bank of preset clips, because the play button on the preset panel is off)

I have SProf installed with all the latest updates.

The best solution for MIDI dropping out seems to be increase the MIDI playback buffers in the MIDI Playback and Recording preferences.
 
The default number is apparently too low, and most users reportedly recommend setting it to 500 or higher.