Why is the strf 9040 bills gun not stabilized?

When I played the strf 9040 bill, the gun isn’t stabilized meanwhile the stabilizer is on? (40 mm gun)

The vehicle is based on the CV9040A, which is mostly unstabilized. It relies on a low-speed stabilizer, so it doesn’t function above a certain speed.

Sorry would like to ask again. The gun stat card listed that strf 9040 bill has two plane stabilizer, does that mean the stat card is incorrect and it should be listed as “vertical stabilizer”? Since i noted that the gun stabilizer works like a vertical stabilizer rather than two plane.

It has one; it’s just more like a low-speed stabilizer like the Shermans.