Level to Slope pieces cause Non-Newtonian speed gain

[Margaret_Thatcher]

If the below coaster is built (done here with cheats) and power launched (I set speed to 0mph), the car will rock back and forth and slowly gain speed. This results in the car derailing and exploding. This happens with both Level to Gentle and Level to Steep. 

[Gymnasiast]

There are more pieces like this - RCT’s physics calculation is flawed. But we can’t really fix it without breaking compatibility.