Repeatability of scenarios with timeline and spline

Hello everybody,

I am currently experimenting with scenarios inside UE5 to simulate traffic situations.
For the movement of the vehicles I am using splines and timelines to move the vehicle along the spline.
My problem is that the scene always has different outcomes.
Sometimes the vehicle is too fast/slow… Sometimes is drives a wider/closer curve… etc…
I can not understand why this problem exists, since I am using a timeline to move along the spline and no factor should influence this variable behaviour.

Does anybody have an idea on how to get 1:1 repetition for each run of my simulation?
Thanks a lot in advance :slight_smile:

Show your blueprint setup, plz