• VSCode Version: 1.26.0-insider (commit 26e5a55)
• OS Version: Arch Linux (rolling release, kernel 4.17.6-1-ARCH)

Steps to Reproduce:

1. With the following minimal code sample:

class FooBar {
    public baz(str: string);
    public baz(v: number);
    public baz(v: any) {

    }

}

const f = new FooBar();
f.baz

2. Trigger autocomplete by placing the cursor after the f.baz and type (.
3. Attempt to navigate to the next override definition by pressing the up arrow on the keyboard.

Expected Results:

• Autocomplete dialog cycles to the last override definition.

Actual Results:

• Autocomplete window disappears.

Does this issue occur when all extensions are disabled?: Yes

Example: