Bike stay rubbing on trainer case?

I have a NEO 2T mated to a 2006 Specialized Roubaix that has a 9 speed cassette.  Based on Tacx videos posted online and feedback from my LBS, I used two thin spacers to help ensure that the cassette is installed properly and doesn't slip.  I noticed, however, that the stay on the non-chain side rests against the trainer case (see image).  This doesn't appear to affect the functioning of the trainer, but I can see where it's rubbing against the case.

Is this normal; or is there are there's I should make to this setup to mitigate the issue?

thanks,

 Randy