We need someone from Ansys to take a look at the fundamental problem: when the acceleration vector reverses in a 3-step solution, the mass does not fall back to the end it started from.

This thread is now very long which makes it less interesting for someone else besides me to answer.

I suggest you start a New Discussion. Keep in mind that Ansys employees are not allowed to download any model or click on any links. You have to insert all the images in the description to fully explain the simplest possible model, what you expected and what you got.  I will not answer this new thread. Let it sit for a few days and wait for someone from Ansys to pick it up.