0.C-12551-g88ee227 Burst-fire weapon cannot burst-fire

Just discovered that the L523-MBR rifle loaded with an LW-30 magazine cannot use its 3-round burst-fire mode. When wielding it and pressing Shift+F, it simply does not change modes. I confirmed that this still worked on other weapons, but cannot figure out why this one is not. (I don’t know that the magazine has anything to do with it, but given how relatively new that feature is, I included that information anyway.)