Audio drops out, after the beginning of the playback loop during the vocal phrase "cry to me" in this repro, during the section visible on the screen. While this loop is for repro purposes the dropouts can be heard when not looping, randomly. This happens during normal non-looping playback, though to a much lesser degree. Looping seems to increase the possiblity of it happening. It is not associated with CPU usage, as viewed in the Reaper Performance Meter.