Type narrowing down on a union type with null results in incorrect type when applying `typeof`

Bug Report

🔎 Search Terms

type narrowing down, typeof

🕗 Version & Regression Information

I've tested all versions until 4.4.0 (Nightly)

⏯ Playground Link

https://www.typescriptlang.org/play?ts=4.4.0-dev.20210706#code/C4TwDgpgBAwg9gO2AQwJYIgJygXigbygGNEV0sAuA0SKgIgDM446BfKAH2vAnoCNkmNpygIArgBsJUVgFgAUAoZiERYKkRRgEAM7AAFOjBjgVeEjQZMASgIKoDqKgZRDCY8AB0JC+UwB+TxpoHFCoAHImOHDbfHtHBIB6RKgAdzhMAGsdeISHZCIiCDBgHQAxZjcPb1JLLGsAbly8gqKS8sr8YPootmtmpJSAEThdUThgNIzsgcdW4tKKuCqTGt8rKGQdLR44FyNVnzIrfvk8ucKFjuWunh7mYS2dyD2nd0Pav1OEuXlfpRUag0CE2l3aSxWpm4tCgjAerFirCAA

💻 Code

type Container = { container: {type: "foo"} | {type: "bar"} | null }

function test(input: Container) {
    if (input.container?.type === 'foo') {
        // works
        acceptsFoo(input.container);
        acceptsFoo({type: "foo"})
        // Does not works
        acceptsFoo(input.container as typeof input.container)
        acceptsFoo({type: "foo"} as typeof input.container)
		/**
Error:
 Argument of type '{ type: "foo"; } | null' is not assignable to parameter of type '{ type: "foo"; }'.
  Type 'null' is not assignable to type '{ type: "foo"; }'.(2345) \
**/
    }
}

function acceptsFoo(input: {type: "foo"}) {}

🙁 Actual behavior

input.container and input.container as typeof input.container are not equivalent.

🙂 Expected behavior

input.container and input.container as typeof input.container should be equivalent.

Reproduce the reported narrowing behavior in the linked TypeScript Playground using the provided Container and test function. Start by tracing the type-checker handling of optional property narrowing and typeof assertions; done means input.container and input.container as typeof input.container are treated equivalently without the nullability error.