Logic Studio apps Dropped beat repeating a marker


Here's an interesting one. I'm using Mainstage 3. I have a backing track setup which was created in Reason. Audio tracks were imported into Garage Band with the same tempo and markers were added. Double checked marker locations. All at the beginning of measures. Checked the tempo with Garage Band's metronome. Matches my click beats beginning to end. Export track as usual and import aiff files into Mainstage.

Everything is linked at all file play together with no problem. Until I turn on cycle to repeat the current marker. When if repeats the first time, it drops about a half a beat. This happens on all songs with backing tracks, and only the first time a marker is repeated in a song. If I repeat the marker again, or repeat a later marker, there is no dropped beats.

Any thoughts?