Stencil version:

 @stencil/core@1.7.5

I'm submitting a:
[ X] bug report
[ ] feature request
[ ] support request

Current behavior:
Adding child element to a slot on IE11 or Edge displays below template.

Expected behavior:
Element displays adjacent to original slot content.

Steps to reproduce:
Open https://umdjm.github.io/StencilFallbackDemo/ on IE11
Code https://github.com/umdjm/StencilFallbackDemo

Related code:

  render() {
    return <div>
      HEADER
      <br/>
      SLOT GOES HERE (
        <slot />
      )
      <br/>
      FOOTER
    </div>;
  }

    <my-component>
      <p> Initial Slot Data </p>
    </my-component>

Other information:

IE Screenshot

Chrome Screenshot