Actually, it is showing the waveform for the next clip, even when they aren’t touching. The clips were at one time made into a part, and grouped, but now are not. Zoomed out, all is well, then at a certain point the waveform becomes the area of the next clip if its edge was slipped out. Then as you keep zooming it goes back to the correct data again.
Picts of two consecutive zoom levels of the same clip.