I'm encountering an issue where when I play back a song that I've made using RealTracks, it is not consistent.

It will sound fine one time, and then the next playback at random bar the instruments will play some out of key note that sounds bad. I have to change the key of that one bar - or perhaps delete the chord and re-enter it slightly different (e.g. replace Cm with Cm7) to fix it. But then on the next playback the issue will surface on another bar that previously was fine.

Anyone else experiencing this, and if so what is the best way to resolve it?

Thanks!