diff --git a/complete.html b/complete.html
index ec0a7e45e12..fc0a5d8097b 100644
--- a/complete.html
+++ b/complete.html
@@ -29037,7 +29037,10 @@ <h5 id=playing-the-media-resource><span class=secno>4.8.10.8 </span>Playing the
   a <a href=#text-track>text track</a> is added to the <a href=#list-of-text-tracks>list of text tracks</a> for a <a href=#media-element>media
   element</a>, all of the <a href=#text-track-cue title="text track cue">cues</a> in that <a href=#text-track>text
   track</a>'s <a href=#text-track-list-of-cues title="text track list of cues">list of cues</a> must be added to the
-  <a href=#media-element>media element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a>.</p>
+  <a href=#media-element>media element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a>. When a <a href=#media-element>media
+  element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a> has new cues added while the
+  <a href=#media-element>media element</a> is <a href=#dom-media-paused title=dom-media-paused>paused</a> but its <a href=#show-poster-flag>show
+  poster flag</a> is not set, the the user agent must run the <i><a href=#time-marches-on>time marches on</a></i> steps</p>
 
   <p>When the <a href=#current-playback-position>current playback position</a> of a <a href=#media-element>media element</a> changes (e.g.
   due to playback or seeking), the user agent must run the <i><a href=#time-marches-on>time marches on</a></i> steps. If the
diff --git a/index b/index
index ec0a7e45e12..fc0a5d8097b 100644
--- a/index
+++ b/index
@@ -29037,7 +29037,10 @@ interface <dfn id=htmlmediaelement>HTMLMediaElement</dfn> : <a href=#htmlelement
   a <a href=#text-track>text track</a> is added to the <a href=#list-of-text-tracks>list of text tracks</a> for a <a href=#media-element>media
   element</a>, all of the <a href=#text-track-cue title="text track cue">cues</a> in that <a href=#text-track>text
   track</a>'s <a href=#text-track-list-of-cues title="text track list of cues">list of cues</a> must be added to the
-  <a href=#media-element>media element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a>.</p>
+  <a href=#media-element>media element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a>. When a <a href=#media-element>media
+  element</a>'s <a href=#list-of-newly-introduced-cues>list of newly introduced cues</a> has new cues added while the
+  <a href=#media-element>media element</a> is <a href=#dom-media-paused title=dom-media-paused>paused</a> but its <a href=#show-poster-flag>show
+  poster flag</a> is not set, the the user agent must run the <i><a href=#time-marches-on>time marches on</a></i> steps</p>
 
   <p>When the <a href=#current-playback-position>current playback position</a> of a <a href=#media-element>media element</a> changes (e.g.
   due to playback or seeking), the user agent must run the <i><a href=#time-marches-on>time marches on</a></i> steps. If the
diff --git a/source b/source
index 03aafabb076..6dacf710bd1 100644
--- a/source
+++ b/source
@@ -30985,7 +30985,10 @@ interface <dfn>HTMLMediaElement</dfn> : <span>HTMLElement</span> {
   a <span>text track</span> is added to the <span>list of text tracks</span> for a <span>media
   element</span>, all of the <span title="text track cue">cues</span> in that <span>text
   track</span>'s <span title="text track list of cues">list of cues</span> must be added to the
-  <span>media element</span>'s <span>list of newly introduced cues</span>.</p>
+  <span>media element</span>'s <span>list of newly introduced cues</span>. When a <span>media
+  element</span>'s <span>list of newly introduced cues</span> has new cues added while the
+  <span>media element</span> is <span title="dom-media-paused">paused</span> but its <span>show
+  poster flag</span> is not set, the the user agent must run the <i>time marches on</i> steps</p>
 
   <p>When the <span>current playback position</span> of a <span>media element</span> changes (e.g.
   due to playback or seeking), the user agent must run the <i>time marches on</i> steps. If the