Intellisense suggests methods with mismatched "this" parameter types

[UselessPickles]

TypeScript Version: 2.6.2

Code

class ValueWrapper<T> {
    constructor(private readonly value: T) {}

    public getValue(): T {
        return this.value;
    }

    public isZero(this: ValueWrapper<number>): boolean {
        return this.value === 0;
    }
}

const stringWrapper = new ValueWrapper<string>("hello");
const numberWrapper = new ValueWrapper<number>(42);

Expected behavior:

Intellisense should only suggest the isZero method on numberWrapper, but not for stringWrapper.

Actual behavior:

Intellisense does not filter out suggestions based on this param types.
(screenshot from the Typescript Playground)