Missing IntelliSense for optional property from array type constraints

Bug Report

🔎 Search Terms

🕗 Version & Regression Information

searched a related issue: https://github.com/microsoft/TypeScript/issues/30058

⏯ Playground Link

Playground link with relevant code

💻 Code

type ZZZ = {
    bar?: number,
    foo: string
}

function test<T extends ZZZ>(c: T) {

}

function testArr<T extends ZZZ[]>(c: T) {

}

// case 1:
test({
    // foo got intellisense
    // bar got intellisense
})

// case 2:
test({
    foo: '333',
    // bar got intellisense
})

// case 3:
testArr([
    {
        foo: '111',
        // bar got no intellisense
    },
])

// case 4:
testArr([
    {
        // foo got intellisense
        // bar got intellisense
    }
]);

🙁 Actual behavior

case 3 missing the IntelliSense for option property bar

🙂 Expected behavior

show completion for property bar

Start with the linked TypeScript Playground and compare IntelliSense in test and testArr, focusing on case 3 where the array element lacks completion for bar. Done means the optional property bar is offered there while preserving the existing completion behavior in the other cases.