Goto autocompletion doesn't respect Editor: Insert Spaces setting

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

Windows

What is the issue affecting?

Completion

Expected Behaviour

As can be seen in the images below, the autocompletion of goto continue will indent the ::continue:: line with four spaces, while my settings have Editor: insert spaces unchecked, which means it should insert a tab character instead.

Actual Behaviour

Note: in these images, the tab character is rendered as an arrow, while spaces are rendered as dots.
Image 1
Image 2

Reproduction steps

1. In VSCode, set your Editor: Insert Spaces setting to false
2. Try the following code:

local arr = {}

for k,v in pairs(arr) do
	if type(k) == "string" then
		goto continue
	end
    ::continue::
end

3. When you start typing goto continue, and select the popup, you'll get the four spaces indentation instead of tab on the ::continue:: line.

Start by reproducing the goto completion behavior in the VS Code extension with Editor: Insert Spaces disabled and the Lua snippet shown, then trace the completion path. Done means selecting goto continue indents the label with a tab character rather than spaces when that setting is disabled.