jsdoc: key definition for objects using square brackets

Why jsodc doesn't recognize keys defined via variables inside square brackets outside of the object's "constructor"?

for example:

const key = /** @type {const} */ "someKey";

const a = {};
a[key] = 42;
a["someOtherKey"] = 42;
const b = {
    someOtherKey: 42,
    [key]:4
}

as a result:
object b contains both keys, when
object a only "someOtherKey"

Tried in vscode

same for Object.defineProperty