[CWBRN-31277] PRV Track Pane Solo button does not support Exclusive Solo

This was initially reported with Platinum version 21.00.01 Build 254 and occurs in both 32-bit and 64-bit versions in February, but was at status "Awaiting Reply".  After communication with Tech Support, the status has been changed to "Submitted to Development", so the problem still exists in 21.01.00 Build 37.
 
[Steps to reproduce]
1. Create new project
2. Insert soft synth creating MIDI source and First Audio Out track pair
3. Insert additional Audio track
4. Make MIDI track active and open PRV
5. Turn on Exclusive Solo in Control Bar
6. Click Solo button in PRV Track Pane
7. Click Solo button on Audio track in Track View
 
[Expected results]
Step 6: MIDI and Instrument track pair set to Solo
Step 7: MIDI and Instrument tracks Solo status should be cleared and the Audio track should be set to Solo.  PRV Track Pane Solo status should be cleared
 
[Actual results]
Step 6: MIDI and Instrument track pair are set to Solo  [PASSED - OK]
Step 7: Instrument track Solo status cleared.  MIDI track status still set to Solo and Audio track is set to Solo in Track View.  PRV Track Pane status is still set to Solo.  [FAILED]
 
Workaround: Use the Track View controls to manage Solo status when using Exclusive Solo and avoid using the PRV Track Pane to Solo tracks until this is fixed.

I don't see any reference to Exclusive Solo in the CWBRN-31737 threads unless I missed it, but my problem could still be related and just be an edge case for a larger issue.