Bright colored pinwheels go 'round in my head.
Yeah! I think the same phenomenon happens on the “Singles: 1969-1973” quad!I just listened with my Jabra over ear headphones (instead of my AirPods) and now I can hear Karen's voice in both channels. In Yesterday Once More, the sound changes in the chorus when Karen sings "still shines" and when she sings "as they melt the years away". Maybe they were trying to achieve something with the overdubbing.