Classes go missing from the built-in help after restarting the editor

[aaronfranke]

Tested versions

• Reproducible on the latest master as of writing, 4.3 rc 9221294
• Reproducible on 4.3 beta 1
• Reproducible on 4.2.1 stable
• Reproducible on 4.1.4 stable
• Reproducible on 4.0.4 stable
• Not applicable for 3.5.3 stable (it never shows up in the docs)

System information

macOS 14.5

Issue description

For custom classes defined with class_name, they appear in the built-in help / documentation occasionally, but they go missing from just restarting the editor. This happens even with a nearly empty project (just the one script and icon.svg). See the reproduction steps and minimal reproduction project below for details.

Steps to reproduce

1. Open the minimal reproduction project.
2. Open the help page, search for "seat", and you will see this:

3. Restart Godot.
4. Open the help page, search for "seat", and you will see this:

Minimal reproduction project (MRP)

missing-doc-bug.zip

[dalexeev]

Duplicate of:

• Documentation generated by GDScript documentation comments disappears #72406
• The documentation for a class defined by the keyword 'class_name' does not appear when searching using the '(doc) Search Help' #86577

Thanks for reporting the bug nonetheless!