Manual Multicam Removes Audio when switching to Cam2

Hello,

SETUP: I have manual multicam sequences, created by nesting three layers [Camera 1, Camera 2, Audio 1], right clicking --> Multi-cam --> Enable.

ISSUE: It works as expected, except for when I'm switching between camera angles. Only Camera 1 will have audio, Camera 2 doesn't show or play any audio. (You can see in the attached screenshot the [MC2] clips lacking audio.) When I disable mutlicam or flatten, the audio reappears. Does anyone know what may be going on?

SYSTEM: iMac, Mojave, Premiere Pro v15.0