I have the same issue and can confirm it goes back at least to 0.9.6.
The workaround you suggest sounds much easier than what I've been doing - either editing the midi cc's for volume and panning in the piano roll which seems to hold on an audio export, or export the midi track (soloed) to a new audio track in the project. After that I would mute (or delete) the midi track and control volume, panning etc. on the new audio track. I'm gonna try your workaround next time.
I have the same issue and can confirm it goes back at least to 0.9.6.
The workaround you suggest sounds much easier than what I've been doing - either editing the midi cc's for volume and panning in the piano roll which seems to hold on an audio export, or export the midi track (soloed) to a new audio track in the project. After that I would mute (or delete) the midi track and control volume, panning etc. on the new audio track. I'm gonna try your workaround next time.
Regards,
Art