Hello,
I have a few questions for you that will help narrow down what issue it is that you are experiencing.
Quick questions:
- Can you reproduce this issue in a clean project?
- If so, could you provide a detailed set of steps in order to reproduce this issue on our end?
- Could you provide screen shots of the blueprints involved?
- Have you tried using the back up files that are automatically generated(Default path: C:\Users\YourUserName\Documents\Unreal Projects\YourProjectName\Saved\Backup)?
- Are you currently using any source control?