Type diagnostics fail on union types of `Class|Class[]`

[ttytm]

How are you using the lua-language-server?

NeoVim

Which OS are you using?

Linux

What is the issue affecting?

Type Checking

Expected Behaviour

no warnings when annotating a union type of ---@param some_param Class|Class[]

---@class SomeClass
---@field [1] string
-- ...

---@param some_param SomeClass|SomeClass[]
local function some_fn(some_param) return end -- pretend to do some work

-- both should be valid
some_fn { { "test" } }
some_fn { "test" }

Actual Behaviour

---@class SomeClass
---@field [1] string
-- ...

---@param some_param SomeClass|SomeClass[]
local function some_fn(some_param) return end

some_fn { { "test" } } -- <- diagnostic: "Cannot assign `table` to `string`."
some_fn { "test" } -- <- this is valid.

array-only is valid:

---@param some_param SomeClass[]
local function some_fn(some_param) return end

some_fn { {"test"} } -- <- this is valid.

without using a class it is valid and correctly type checked:

---@param some_param {[1]: string}|{[1]: string}[]
local function some_fn(some_param) return some_param end
some_fn { "test" }
some_fn { { "test" } }

Reproduction steps

try the code above while having it checked with sumenko lua

Additional Notes

No response

Log File

No response