diff --git a/packages/core/src/block/base/content.ts b/packages/core/src/block/base/content.ts
index 79600ed..be5aebb 100644
--- a/packages/core/src/block/base/content.ts
+++ b/packages/core/src/block/base/content.ts
@@ -211,16 +211,16 @@ class Content extends TreeNode {
         const {
             anchor,
             focus,
-            anchorBlock,
-            focusBlock,
+            // anchorBlock,
+            // focusBlock,
             isCollapsed,
             isSelectionInSameBlock, // This is always be true.
             direction,
             type,
         } = selection;
 
-        if (anchorBlock !== this || focusBlock !== this)
-            return null;
+        // if (anchorBlock !== this || focusBlock !== this)
+        //     return null;
 
         return {
             start: { offset: Math.min(anchor.offset, focus.offset) },
diff --git a/packages/core/src/block/base/format.ts b/packages/core/src/block/base/format.ts
index faff4f9..aa79a20 100644
--- a/packages/core/src/block/base/format.ts
+++ b/packages/core/src/block/base/format.ts
@@ -337,8 +337,23 @@ class Format extends Content {
     override blurHandler() {
         super.blurHandler();
         const needRender = this.checkNeedRender();
+        const _cursor = this.getCursor();
+        let cursor = null;
+        if (_cursor) {
+            const { start, end } = _cursor;
+            cursor = {
+                path: this.path,
+                block: this,
+                anchor: {
+                    offset: start.offset,
+                },
+                focus: {
+                    offset: end.offset,
+                },
+            };
+        }
         if (needRender)
-            this.update();
+            cursor ? this.update(cursor) : this.update();
     }
 
     /**
diff --git a/packages/core/src/inlineRenderer/index.ts b/packages/core/src/inlineRenderer/index.ts
index c97fc6b..1559469 100644
--- a/packages/core/src/inlineRenderer/index.ts
+++ b/packages/core/src/inlineRenderer/index.ts
@@ -47,7 +47,9 @@ class InlineRenderer {
             block,
             cursor && cursor.block === block ? cursor : {},
         );
-        domNode!.innerHTML = html;
+        if (domNode!.innerHTML !== html) {
+            domNode!.innerHTML = html;
+        }
     }
 
     collectReferenceDefinitions() {