Sonar 8.5.3
I have a pretty simple cakewalk project that contains only a bass track and a Session Drummer drum track. Couldn't be much simpler. When I export the project to a wav file, which I have done hundreds of times with other projects, some of the drum track is missing in some sections. Things like the high hat stops playing for a section of the track but then starts playing again. The track sounds fine in Cakewalk, no issues with the drum track. This only occurs when I export the project to wav.
Any suggestions?