Good idea. Something to try anyway.
Now that I think about it, maybe twice the idle speed on my 2012 2.5i CVT blipped so low for a second the engine shuddered, but then perked right back up. IIRC, it was after taking off after a cold start.
I doubt this has anything to do with the CVT though. The CVT has a torque converter just like any other automatic trans. If the TC isn't unlocking at a stop you've got huge issues.