From @use-strict on September 10, 2016 10:0

• VSCode Version: 1.6.0-insider
• OS Version: Windows 7

Steps to Reproduce:

interface Options {
    webpackConfig: string;
}
let opts: Options = {
    webpackConfig: "./webpack.config.js"
    //                       ^ typing dot here autocompletes with "webpackConfig"
}

Expected behavior:
Auto-suggest should trigger when pressing ENTER (or maybe TAB?), but not on dot

Actual behavior:
When typing a dot (.), auto-suggest selects the first item

Workaround:
Pressing escape before the dot. Very annoying!!

Copied from original issue: microsoft/vscode#11824