Steps to Reproduce:
1. Import any element from the Gallery
2. Add an animation for it, Category: Motion Paths, Effect: Curve
3. Draw a curve
4. Edit the curve by moving end point, for example
5. Switch to another slide and return back to the slide with animation
The Motion path is reverted to the original state
The Motion path remains changed
User Profile Reset: No
OpenGL enabled: Yes
Tested on 2 computers with Arch Linux x86-64, both still and fresh and on Ubuntu 17.10.
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:3.4) Goanna/20180228 PaleMoon/27.8.0
Addition: If I change a control point (round one) after changing data point, LO saves all changes.
Addition to my previous addition: Actually, not all changes, but only for that curve.
Tested on Windows 10: It's also affected.
*** This bug has been marked as a duplicate of bug 33022 ***