Why is the ZTZ-99A's right turret cheek stronger than the left one?

From what I can see in-game, both turret cheek’s materials are identical, with the same thickness and both are covered by FY-5 heavy ERA.

Somehow, the right cheek is about 100mm stronger than the left one,
this applies to both ZTZ-99A and WZ 1001.

Bug report if you consider it as a bug, Thank You: