Train Sim World 3 Harlem Line M7a Uncouple Control Still Not Fixed.

I have posted this before but in case it was missed i'll bring it up once more.The M7A uncouple switch still doesn't work sticking in the key to uncoulpe units does nothing but it strange because the other M7 on lirr couple system work fine.I'm surprised after this long such a minor issue wasn't fixed.