I have not been able to make the recording yet, but with the following information I think it is more than enough for developers to solve this.
In each slider you can add elements such as title, text, button, and each of these elements has 3 configuration tabs that are Content, Animation and Style. If, after adding the animation, you leave the Content or Style tab active in the DOM of the frontend for the element, it returns data-animation="{}" that is, empty, so that the animation settings are saved, it is necessary to leave the Animation tab active.
It never worked this way and it shouldn't work like this so animation settings should be saved and loaded into the DOM no matter which tab is Active. Please fix soon.
Regards