Thanks for your kind words and longtime support! I always feel honored to hear when players have grown up with Unturned.
That is bizarre it would lose the object changes like that. Unfortunately without knowing why it did that I don't have any suggestions, but for what it's worth going forward I would suggest either:
- (more work, but more powerful) Using version control with your map, for example Git (free). I use Git for Unturned's versioning. It lets you undo/redo changes and keep a history of all your work on a project.
- Copying the map folder from Unturned/Maps into a separate backup location each day that you work on the map.
Sorry not to have an answer why the object changes were lost.