Extraneous empty line after the beginning of a link containing a macro

<div>
    <a href="https://perdu.com">
      <ac:structured-macro ac:name="random-macro">
        <ac:parameter ac:name="param">value</ac:parameter>
      </ac:structured-macro>
    </a>
</div>

beginDocument
beginGroup
beginParagraph
beginLink [Typed = [true] Type = [url] Reference = [https://perdu.com]] [false] [[shape]=[rect]]
onMacroStandalone [random-macro] [param=value]
endLink [Typed = [true] Type = [url] Reference = [https://perdu.com]] [false] [[shape]=[rect]]
endParagraph
endGroup
endDocument
 

(((
[[

{{random-macro param="value"/}}>>url:https://perdu.com||shape="rect"]]
)))

(((
[[{{random-macro param="value"/}}>>url:https://perdu.com||shape="rect"]]
)))