CameRigRail Incorrect moving. Bug? Need fast help please

UE 5.3. Using new camera rig rail to animate the moving path of a character. The tool is good itself. But i have a problem. The component thinks of an any point on a spline is a break with soft edges (soft keys) so the spline is a composition of different splines with soft keys on edges… so my char accelerates, runs, looses the speed before and after any point on spline on the level (not in sequncer). I tried using linear keys in sequncer - no help. Rig rail component simply uses sequncer keys as main to start and stop and spline keys as breaks. Any idea how to solve this???
Use Absolute Position = on.
Drive mode = manual.