I discovered this by accident while taking a quick look at a large number of tracks, so it might be low-incidence with normal behavior, but it's a glitch that shouldn't be there. I had switched my track change method to cross-fade (aggressive/smooth doesn't matter) to eliminate a small click during track changes. Not sure if the click is a MC or DAC problem, but cross-fade 0.1s eliminates the click.
I found that if your track change/switch tracks method is Cross-Fade (0.1s) then switching tracks frequently can cause MC to go into "Buffering" mode and it hangs playback for 10-15 seconds. By frequently, I mean 10-30 manual track changes per minute. It is especially easy to provoke if you manually change tracks to the previous track, within a second or two of the next track starting.
I can NEVER provoke this behavior when the track change method is gapless, only cross-fade.
This behavior also occurs during normal use, most frequently if you jump to the previous track right as the next track starts playing, even if you have done no manual track changes recently. Again, this only happens when cross-fade is used. Gapless never exhibits the issue. (but for me, gapless has a click)
It's an annoying issue because MC hangs on "Buffering" for so long. It eventually recovers and the correct track plays, but the first second or two of the track is cut off. Normally I would associate "buffering" with a delay reading the media file from disk. But if that were the cause, switching from crossfade to gapless wouldn't fix it.