Incorrect transmission operation the ZSU-37-2 Yenisei

I wonder, when the Su-100P and Yenisei have the same transmission, the SU-100P has the ability to turn on the spot, while the Yenisei does not. Why?
ZSU-37-2 is created on the basis of the SU-100P, the engine and transmission are the same, but the Yenisei does not have a turning ability on the spot.
Gaijin, please fix this.