Background loading

I'd like to draw your attention to a specific page in the documentation: Background Loading(https://docs.godotengine.org/en/stable/tutorials/io/background_loading.html).
I encountered an issue with the sample code provided. The code seems to throw an error, and upon a second press of the Button, a null reference error occurs. I thoroughly checked both GDScript and C# implementations, and it appears that the CACHE_MODE_REUSE in the CacheMode might not be functioning as expected?.

Additionally, there is no mention that non-string objects in the export are already cached and no need for load_threaded_request for them . This could potentially lead to confusion for developers trying to implement background loading efficiently.

I believe addressing these issues or providing clarification in the documentation would greatly benefit the Godot.

Godot 4.2.1