I applied for and received a Global Entry identification card about a year ago. Along with Global Entry, the card is also eligible for TSA Pre.
On every occasion, when departing from Columbus International Airport (CMH) I've gone into the TSA Pre line only to be told I can't use the card and have to go to the back of the standard security line.
The card has worked fine when entering through Global Entry. As well as the TSA Pre lines at other airports.
I've never received a satisfactory answer as to why I can't enter through TSA Pre at CMH. The most I've been told is it has something to do with my airline ticket and not being pre-approved.
Thankfully, the delay in switching to the standard security line has never caused any missed flights or other issues, but I'd still like to know why my identification isn't allowed.