If I paste the short example from [[mw:Extension:Score]]:
<score vorbis="1">\relative c' { f d f a d f e d cis a cis e a g f e }</score>
into a Flow post, save, and then re-edit that post, then it shows all of this in the edit-area:
<score vorbis="1">\relative c' { f d f a d f e d cis a cis e a g f e }</score>
<span></span><div class="mediaContainer" style="position:relative;display:block;width:300px"><audio id="mwe_player_0" style="width:300px" poster="//bits.wikimedia.org/static-1.25wmf6/resources/assets/file-type-icons/fileicon-ogg.png" controls="" preload="none" class="kskin" data-durationhint="11.600453514739" data-disablecontrols="options,timedText"><source src="//upload.wikimedia.org/score/j/q/jqn99bwy8777srpv45hxjoiu24f0636/jqn99bwy.ogg" type="audio/ogg; codecs="vorbis""></source>Sorry, your browser either has JavaScript disabled or does not have any supported player.<br>
You can [//upload.wikimedia.org/score/j/q/jqn99bwy8777srpv45hxjoiu24f0636/jqn99bwy.ogg download the clip] or [https://www.mediawiki.org/wiki/Special:MyLanguage/Extension:TimedMediaHandler/Client_download download a player] to play the clip in your browser.</audio></div>
None of that new content should be there.
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**Version**: unspecified
**Severity**: normal
**See Also**:
https://bugzilla.wikimedia.org/show_bug.cgi?id=62270