diff --git a/src/main/java/org/jsoup/parser/HtmlTreeBuilder.java b/src/main/java/org/jsoup/parser/HtmlTreeBuilder.java
index 3658bbba2b..e29051ba27 100644
--- a/src/main/java/org/jsoup/parser/HtmlTreeBuilder.java
+++ b/src/main/java/org/jsoup/parser/HtmlTreeBuilder.java
@@ -308,6 +308,7 @@ void error(HtmlTreeBuilderState state) {
                 currentToken.tokenType(), currentToken, state));
     }
 
+    /** Inserts an HTML element for the given tag) */
     Element insert(final Token.StartTag startTag) {
         dedupeAttributes(startTag);
 
@@ -714,7 +715,10 @@ private boolean inSpecificScope(String[] targetNames, String[] baseTypes, @Nulla
         // don't walk too far up the tree
 
         for (int pos = bottom; pos >= top; pos--) {
-            final String elName = stack.get(pos).normalName();
+            Element el = stack.get(pos);
+            if (!el.tag().namespace().equals(NamespaceHtml)) continue;
+
+            final String elName = el.normalName();
             if (inSorted(elName, targetNames))
                 return true;
             if (inSorted(elName, baseTypes))
diff --git a/src/main/java/org/jsoup/parser/HtmlTreeBuilderState.java b/src/main/java/org/jsoup/parser/HtmlTreeBuilderState.java
index df2d81eb7a..21620b1a7d 100644
--- a/src/main/java/org/jsoup/parser/HtmlTreeBuilderState.java
+++ b/src/main/java/org/jsoup/parser/HtmlTreeBuilderState.java
@@ -1299,13 +1299,20 @@ boolean process(Token t, HtmlTreeBuilder tb) {
                 Token.StartTag startTag = t.asStartTag();
                 String name = startTag.normalName();
 
-                if (inSorted(name, InCellNames)) {
+                if (inSorted(name, InCellNames)) { // th, th
                     tb.clearStackToTableRowContext();
                     tb.insert(startTag);
                     tb.transition(InCell);
                     tb.insertMarkerToFormattingElements();
-                } else if (inSorted(name, InRowMissing)) {
-                    return handleMissingTr(t, tb);
+                } else if (inSorted(name, InRowMissing)) { // "caption", "col", "colgroup", "tbody", "tfoot", "thead", "tr"
+                    if (!tb.inTableScope("tr")) {
+                        tb.error(this);
+                        return false;
+                    }
+                    tb.clearStackToTableRowContext();
+                    tb.pop(); // tr
+                    tb.transition(InTableBody);
+                    return tb.process(t);
                 } else {
                     return anythingElse(t, tb);
                 }
@@ -1322,15 +1329,27 @@ boolean process(Token t, HtmlTreeBuilder tb) {
                     tb.pop(); // tr
                     tb.transition(InTableBody);
                 } else if (name.equals("table")) {
-                    return handleMissingTr(t, tb);
-                } else if (inSorted(name, InTableToBody)) {
-                    if (!tb.inTableScope(name) || !tb.inTableScope("tr")) {
+                    if (!tb.inTableScope("tr")) {
+                        tb.error(this);
+                        return false;
+                    }
+                    tb.clearStackToTableRowContext();
+                    tb.pop(); // tr
+                    tb.transition(InTableBody);
+                    return tb.process(t);
+                } else if (inSorted(name, InTableToBody)) { // "tbody", "tfoot", "thead"
+                    if (!tb.inTableScope(name)) {
                         tb.error(this);
                         return false;
                     }
+                    if (!tb.inTableScope("tr")) {
+                        // not an error per spec?
+                        return false;
+                    }
                     tb.clearStackToTableRowContext();
                     tb.pop(); // tr
                     tb.transition(InTableBody);
+                    return tb.process(t);
                 } else if (inSorted(name, InRowIgnore)) {
                     tb.error(this);
                     return false;
@@ -1346,14 +1365,6 @@ boolean process(Token t, HtmlTreeBuilder tb) {
         private boolean anythingElse(Token t, HtmlTreeBuilder tb) {
             return tb.process(t, InTable);
         }
-
-        private boolean handleMissingTr(Token t, TreeBuilder tb) {
-            boolean processed = tb.processEndTag("tr");
-            if (processed)
-                return tb.process(t);
-            else
-                return false;
-        }
     },
     InCell {
         boolean process(Token t, HtmlTreeBuilder tb) {
diff --git a/src/test/resources/fuzztests/63242.html.gz b/src/test/resources/fuzztests/63242.html.gz
new file mode 100644
index 0000000000..9f1fda2151
Binary files /dev/null and b/src/test/resources/fuzztests/63242.html.gz differ