[Sequencer][Audio] - Soloing a nested audio track mutes all tracks

When soloing an audio track in sequencer, all the tracks are muted and nothing in soloed.

Attached video shows Mute working correctly followed by Solo not working
[Link Removed]

Cannot reproduce in 4.27 CL18310727

1) Create a level sequencer
2) Add at least two audio tracks
3) Solo one of the tracks

Expected Result:
The soloed track isn't greyed out. When playing back, this is the only track audible

Actual Result:
All the audio tracks are muted. Nothing is soloed

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