Reset focus when refocusing document with a moved element

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@@ -1872,6 +1872,12 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
    data-x="concept-element-local-name">local name</span>, then run the corresponding <span>HTML
    element moving steps</span> given <var>movedNode</var>.</p></li>
 
+   <li><p>If <var>movedNode</var> is a <span>shadow-including inclusive ancestor</span> of
+   <var>movedNode</var>'s <span>node document</span>'s
+   <span data-x="focused area of the document">focused area</span>'s <span>DOM anchor</span>, then
+   set <var>movedNode</var>'s <span>node document</span> <span>should reapply focusing steps</span>
+   to true.</p></li>
+
    <li>
     <p>If <var>movedNode</var> is a <span>form-associated element</span> or the ancestor of a
     <span>form-associated element</span>, then:</p>
@@ -79449,6 +79455,9 @@ dictionary <dfn dictionary>ToggleEventInit</dfn> : <span>EventInit</span> {
   anchor</span> of a <span>focusable area</span> of the <span>currently focused area of a top-level
   traversable</span>, it is <dfn>focused</dfn>.</p>
 
+  <p>Each <code>Document</code> has a boolean <dfn>should reapply focusing steps</dfn>, initially
+  false.
+
   <div w-nodev>
 
   <p>The <dfn>focus chain</dfn> of a <span>focusable area</span> <var>subject</var> is the ordered
@@ -80031,6 +80040,20 @@ dictionary <dfn dictionary>ToggleEventInit</dfn> : <span>EventInit</span> {
    navigable</span>'s <span data-x="nav-document">active document</span>.</p></li>
    <!-- https://software.hixie.ch/utilities/js/live-dom-viewer/?saved=2818 -->
 
+   <li>
+    <p>If <var>new focus target</var> is a <span>focusable area</span> whose
+    <span>DOM anchor</span>'s <span>node document</span>'s
+    <span>should reapply focusing steps</span> is true, then set <var>new focus target</var>'s
+    <span>DOM anchor</span>'s <span>node document</span>'s
+    <span data-x="focused area of the document">focused area</span> to
+    <span>DOM anchor</span>'s <span>node document</span>'s <span>viewport</span> and set
+    <span>DOM anchor</span>'s <span>node document</span>'s
+    <span>should reapply focusing steps</span> to false.</p>
+
+    <p class=note>This ensures that <code data-x="event-focus">focus</code> events are fired when an
+    element is <span data-x="concept-node-move-ext">moved</span> in the DOM.
+   </li>
+
    <li><p>If <var>new focus target</var> is a <span>focusable area</span> and its <span>DOM
    anchor</span> is <span>inert</span>, then return.</p></li>