Audition no longer listing multiple tracks in file from video file

Audition 22.6.0.66 on Windows 10 Pro 21H2

Expected behavior: file with 2 stereo tracks shows 2 channels each in the Files window

Actual behavior: file shows 1 stereo track with 2 channels in the Files window

Noticed issue started occuring within the past 3 months. Files with multiple audio tracks, in this case a video clip with 2 stereo tracks of desktop audio and microphone audio recorded via Nvidia Shadowplay, no longer lists the second stereo track. Only the first stereo track appears in Audition. Other software such as VLC, MPV, XMedia, and Audacity properly detect the second stereo track. Never occured before.