When displaying the LoaderContainer spinner overlay, the visual blocking works correctly (the spinner appears over the entire page). However, users can still navigate through interactive elements behind the loader using the keyboard — for example, by pressing Tab or Shift+Tab.

They can even trigger buttons or input actions using the Space or Enter keys while the loader is active.

If I place a LoaderContainer inside the Dialog's content it is not rendered properly.

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Here are two possible workarounds:

1. The loader container covers the entire page: REPL snippet.
2. Use a Window (instead of the Dialog) and cover only the content of the Window: REPL snippet

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