I dont recall this ever happening before... but today when I had a track solo'd, with the "dim solo" funtion on, I made a few edits to prepare it for looping, and when I chose "Bounce To Clips" sonar took the gain of the clip DOWN the 6db per my dim solo setting.
 
The track in question was routed to an aux, which also had to be solo'd to hear my edits etc.

Is this consistent when the dim solo is enabled?  Does it go away when the track is not solo'ed?  Either this is the way it is "supposed" to work or you have found a bug.

I found something a bit different than what you describe here- after comping a track, I wanted to bounce to track so as not to have the multiple unused takes and just one clean track. But now, every time I edit the same track and bounce to track, the audio engine stops and cannot be restarted and Splat freezes. Anyone else had this happen? I suppose a work around would be to bounce to a new track, but still...