Remarkup's file embed syntax {Fxxx,layout=inline} is not actually rendered inline. Observe:

some text more text

That's because the generated HTML is <p>some text <div …>…</div> more text</p>, and HTML <p> tags may not contain block content like <div> tags. Browsers actually parse this as if it was <p>some text </p><div …>…</div> more text<p></p> (sic).