While working on a project I have frequent occurrences where a .resource disappears from under my nose when saving progress.

Attached is a small project that, for me, has a 100% reproduction rate following these steps:

1. Open or reload the folder (Titanic)
2. Open make_it_disappear.resource in the text editor
3. Copy/Paste line 3 to a new line 4
4. Save
5. Delete line 4
6. Save
7. Copy/Paste line 3 to a new line 4
8. save

Now the file is no longer present in the tree view. The tree view selection jumps to the top-folder and the text editor shows the top folder's __init__.robot file contents.

Versions: Windows 10, Python 3.10.6, RIDE 2.0.5

Interesting detail: If you remove the reference to the resource file from the top-folder __init__.robot, it still opens when loading the project. This does not happen on an even smaller project that contains only the misbehaving file.

Titanic.zip