Different curvature of 2D and 3D spline in Catia V5 R28 and higher

Hello,

2D spline command in sketcher and 3D spline command in GSD creates splines with different curvature.

Both splines based on same points (all on same plane) and without tangency and curvature parameters.

Same operation in R26 or lower creates splines absolutely congruent to each other.

Any idea why?