Many thanks for your incredible response @Dr-Sassi

Sadly, I have to admit that I'm even more confused after the response, of course not because of your explanation skills, rather because of my poor understanding of the dynamic system in C4D.

Firstly, I am quite unsure what the spline does exactly and how the movement happens. In any case, the animation doesn't match my needs as I'm looking to recreate a more gacha ball kind of animation.

I also saw the other file with the emitter, which it would be much better for me and I would like to ask what you changed there as I can't see any difference in terms of settings, while having a better result. However, I am sure that my colleagues will require the animation to be moving a bit more, rather than a fast and dry motion. So I'm afraid I will anyway have to retouch that. Hence, how could I improve the situation?

I mean, what could I do to improve the scene? I have tried to change lots of settings, yet the situation remains the same

Hello Dr.Sassi

here you can find the project file.

https://drive.google.com/file/d/1CTXSnvfQRP-QpBBvmkHRrmKQkkKznKrE/view?usp=sharing

And no, I have not attractors or other forces in the scene. I have checked whether there is some other element disturbin the sim, but I can't find any. I'm not the most expert in particles, so I may be missing something

I'm using a Basic Emitter > Cloner > Rigid Body. When I preview the animation just by playing from the timeline, it all appears correct. But when I cache the object, from the Rigid Body tag (but I also tried from Particle Group) and at that point, after caching it all looks super weird. The balls move with glitches and are not smooth.

Can you please help?

https://drive.google.com/file/d/1gXekBc6zd0DNZNz_n27clkIaSFeVcj28/view?usp=sharing