Link to .capx file (required!):
I know, but the CAPX for this issue will really not help, because all the information will be clean after saved.
Steps to reproduce:
1. Start a new project;
2. Create a sprite;
3. Create 2 new frames;
4. Create 2 or 3 image points;
5. Apply them to all the frames;
6. Close the image editor;
7. Undo what you did;
8. Open the editor;
9. Look inside the second and ahead, frames, they are with the image points, but the first one undo correctly.
10. The points to be undo;
Operating system & service pack:
Construct 2 version: