vscode does not list server-provided completion items.

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

vscode displays the enum

Actual Behaviour

vscode shows no completion available, despite server response.

Reproduction steps

---@alias Option string | "AAA" | "BBB" | "CCC"
---@param x Option[]
local function f(x)
end

f({"|"}) <- trigger completion

Additional Notes

No response

Log File

No response

Start by reproducing the completion issue in the Visual Studio Code Extension using the Lua snippet in the reproduction steps, then inspect how the server response is presented for the Completion area. Done means VS Code displays the enum values AAA, BBB, and CCC at the marked trigger location.