Received a message from Pioneer on Tuesday.
Here's their reply:
"Thank you for contacting Pioneer Electronics (USA) Inc.
The latest firmware on all the new NEX series is 1.03.
You may be looking at the firmware released for last year products, like the AVH-4000NEX. They released the 1.10 for iDatalink issues and other things.
At this time there are no plans to release another update for the AVH-4100NEX.
Is this issue only when you use the iDatalink adapter? If so, have you reached out to them for assistance?
If it happens regardless of iDatalink being connected, I could suspect a memory issue within the stereo."
I'm not sure what I have to do to get the iDatalink out of the path to test if it is the head unit or the iDatalink.