[rc4] styles getting applied twice

[moderndeveloperllc]

It appears that styles are getting applied twice in the shadow DOM:

  static get styles() {
    return [
      css`
          .error {
            background: red;
            color: #fff;
          }
          .success {
            background: green;
            color: #fff;
          }
          .warning {
            background: yellow;
            color: #fff;
          }`,
    ];
  }

shows double in Chrome 71 element inspector:

Versions

• lit-element: v2.0.0-rc4
• webcomponents: v2.2.4

[sorvell]

Thanks, we'll get this fixed asap.