Sonar X3: flipping phase with all UAD plugins?

I noted something earlier while working on a track: all the audio I have running through UAD plugins are now phase flipped. Toggling back and forth makes this easier to hear.
Anyone else?

Hey soundsubs,
 
I use a lot of UAD plugs so this thread got me intrigued. So in X3a I did the following:
 
1. I created two tracks of identical audio.
2. Reversed one phase.
3. Played the two tracks - nulled.
4. Returned phase.
5. Played both tracks - sounded normal.
6. Inserted (one at time) multiple UAD plugs on one track. Played both tracks - sounded normal.
6a. UAD Helios has a preset called flip the phase. If I play both tracks in phase but set the "flip the phase" preset on one track - nullled. 
 
IMO in X3a UAD plugs are NOT causing a track to go out of phase. Unless I'm missing something that you did.