Class generics produce unusable and wrong union types

How are you using the lua-language-server?

Visual Studio Code Extension (sumneko.lua)

Which OS are you using?

MacOS, Windows

What is the issue affecting?

Completion

Expected Behaviour

Methods Peek,Push,Pop have proper type hints

Actual Behaviour

While types of a, b, c are correct the
type hints of methods are unusable with unnecessary union types.

If Push is removed from superclass, then type hints go to normal without unions but still with <T> in many places

local _lua_setmetatable = setmetatable

Stack = {}

--- @generic T
--- @class Stack<T> : {
---     Pop: (fun(self: Stack<T>): T),
---     Peek: (fun(self: Stack<T>): T),
---     Push: (fun(self: Stack<T>, value: T): Stack<T>),
--- }
--- @field protected _stack any[]
--- @field protected _count integer
Stack.__index = {}

--- Creates a new, empty stack.
--- @generic T
--- @return Stack<T>
function Stack.New()
    local this = {
        _stack = {},
        _count = 0,
    }

    return _lua_setmetatable(this, Stack)
end






local st = Stack.New() --[[@as Stack<{ num: integer }>]]

local a = st:Peek()
local b = st:Pop()
local c = st:Push({})

Reproduction steps

Analyze specified code in VSCode with luals installed

Additional Notes

No response

Log File

No response

Reproduce el problema analizando el fragmento de Lua en VS Code con lua-language-server instalado, centrándote en las sugerencias de completado para Stack.New y los métodos Peek, Pop y Push. Compara los tipos inferidos de a, b y c con las sugerencias de métodos esperadas sin tipos unión; se considera terminado cuando los métodos ya no muestran tipos unión inutilizables o innecesarios ni marcadores de posición genéricos sobrantes.