The issue with the BP was NOT the TSA station. At least in Chicago, there is a specific security line for First, Execution Platinum, and Platinum - and maybe a few others. To proceed through that line they scan your BP. An element of the scan is to determine whether you qualify for TSA PreCheck. If so, you are directed to the left where Pre Check passengers do not have the formality of shoe removal, laptops out, etc. If you do not qualify, then to the right.

This is a different procedure than when I went through ORD six months ago when there was no issue with the BP printed by CX.