`getTextSelection` does not return a string

[motform]

Like craftdocs/craft-extension-inspirations#6, I am also getting behaviour (macOS app 2.1.6) where getTextSelection seemingly succeeds but returns the empty string.

const selection = async () => {
	const response = await craft.editorApi.getTextSelection();
	if (response.status !== "success") throw new Error(response.message);

	let selectedText = response.data;
	if (selectedText.length === 0) selectedText = "Text selection is of len 0.";

	const block = craft.blockFactory.textBlock({
		content: selectedText
	});

	craft.dataApi.addBlocks([block]);
}

 
Consistently creates a block with Text selection is of len 0., regardless of I have text selected (which I would assume would give me the selected text) or if I don't have any selection. The latter seems like an API oversight, as I would have intuitively assumed that status fails on no selection.

I wanted to build a small capitalisation utility, but I don't see how you can do that without something as granular as getTextSelection.