montage loop skip bug

Hi gyus. I have a simple problem in montage.
I have a montage containing 40 sequences, and some of them are looping sequence.(ex. death → die (die is looping motion with same motion)
And I found interesting bug that after some times (the time is always differen. sometime it was 1sec, sometimes it over 1 min)
motion is changed to next section.
I looked over AnimMontage.cpp Advance function(line2285~2303) , and found handling looping section part but I don’t know what happends…
I think montage has bug…
Anyone can help??
Thank you.