typescript generic break filter after spreading object in map

[dartess]

TypeScript Version: any, including 4.0.2 and v4.1.0-dev.20201008

Search Terms: typescript generic break filter after spreading object in map? O_o

Code

interface Success {
    isSuccess: true;
}

interface Fail {
    isSuccess: false;
}

type Item =
    | Success
    | Fail

// ok
function foo(a: Array<Item>): void {
    a
        .map((item) => ({...item}))
        .filter((value) => {
            console.log(value);
        });
}

// error
function bar<T extends any>(a: Array<Item>): void {
    a
        .map((item) => ({...item}))
        .filter((value) => {
            console.log(value);
        });
}

Expected behavior:

adding generic to function does not break the code

Actual behavior:

.filter((value) => { after .map((item) => ({...item})) when it inside function with generic trigger error.

Playground Link: https://www.typescriptlang.org/play?ts=4.0.2#code/JYOwLgpgTgZghgYwgAgMoFcFIM7eQbwChkTlhsMsJcAuZMKdCAbkIF9DDRJZEUAxOMAA2BYqXKUc2OvGHYW7TmACeABxQBJSAFtkAXnEkAPmkzSjyU4JGcA9HeQB7ANaEY6EAjDAnIZDBOTgAUcHQAglBQcCoAPNoQOgB8AJR0AG5OwAAmYqTIcJb5AHQ6cGrBwcC6KQZJyMH4xc3ViWwpKUWkxTAiPJXpcMJMtfr1RPmTpAh+2E7CEMXCTgDmwYPDECnMyA7IG0x0CTpdJO2sHIR70FBOUO6e3r7+AEZwULEAKsgQAB6QIGyeDgIBUSVCESiMXiulSGSyuQmpEKUxIpXKlVaOlG9UazWKWPanVRyB6fWgAyGIzqeRJ01m80WyzWBy2Oz2AH4OadkOclEA

[andrewbranch]

This behavior goes back at least to 3.3 😦