From b79c4d810d075549b65fa826e234b20fdc9aa017 Mon Sep 17 00:00:00 2001
From: Jinxuan Zhu <zhujinxuan@gmail.com>
Date: Fri, 27 Apr 2018 17:31:04 -0400
Subject: [PATCH] Fix a bug in normalizeNodeByKey (#1786)

---
 packages/slate/src/changes/with-schema.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/packages/slate/src/changes/with-schema.js b/packages/slate/src/changes/with-schema.js
index 4e6368742..91aeca0ef 100644
--- a/packages/slate/src/changes/with-schema.js
+++ b/packages/slate/src/changes/with-schema.js
@@ -47,7 +47,9 @@ Changes.normalizeNodeByKey = (change, key) => {
   if (!ancestors) return
 
   ancestors.forEach(ancestor => {
-    normalizeNode(change, ancestor, schema)
+    if (change.value.document.getDescendant(ancestor.key)) {
+      normalizeNode(change, ancestor, schema)
+    }
   })
 }