On my local 7.4 system, I see the same thing. I did find a reference that due to refactoring in Pega 7 around rule, this particular field is broken as was specified to show NA rather than the wrong value.
I followed up with engineering and the value is not provided in 7.X and thus why it shows as NA. This was reconfigurwed in 8.X, but the value is not displaying. I have created a bug to get it corrected in the next release of 8.X. Nothing will be done to the 7.X version.