This started happening consistently in recent releases.   If I chose to loop a short region, lets say a section that has tom fills so I can eq them in context, Sonar now has trouble resetting iself each subsequent loop and after 2 or 3 iterations, it freezes. My projects have 40 - 50 tracks with a many but not overbearing number of plugins   Anyone else notice this and any ideas how to remedy?  Any config setting I can increase etc?  I tried increasing playback buffer but didn't help

How small in M:B:T?

It does on small or larger, one or 2 measures and even up to 20 measures (and likely larger but haven't been all scientific about it yet.  After the second and onto the third iteration it freezes