I'm running PM version 2025, 10, build 8835 on a MacBook Pro (M4) running Tahoe 26.0.1.
All of a sudden my code to insert a 3 character month stopped working. I believe this coincided with an update to the version of Photo Mechanic I'm now using on the M4, though I'm not positive.
{iptcmonthname} will show "October" for the month, but {iptcmonthname3} reads the code, and isn't showing the intended result: