diff --git a/packages/collapse-item/index.js b/packages/collapse-item/index.js
index 3b93c95a8..bb650378b 100644
--- a/packages/collapse-item/index.js
+++ b/packages/collapse-item/index.js
@@ -114,17 +114,16 @@ export default sfc({
   },
 
   render(h) {
-    const titleSlots = CELL_SLOTS.reduce(
-      (slots, name) => {
-        if (this.slots(name)) {
-          slots[name] = () => this.slots(name);
-        }
-        return slots;
-      },
-      {
-        default: () => this.slots('value')
+    const titleSlots = CELL_SLOTS.reduce((slots, name) => {
+      if (this.slots(name)) {
+        slots[name] = () => this.slots(name);
       }
-    );
+      return slots;
+    }, {});
+
+    if (this.slots('value')) {
+      titleSlots.default = this.slots('value');
+    }
 
     const Title = (
       <Cell
diff --git a/packages/dialog/index.js b/packages/dialog/index.js
index 835b11ab7..30305f3a5 100644
--- a/packages/dialog/index.js
+++ b/packages/dialog/index.js
@@ -6,7 +6,11 @@ let instance;
 
 const initInstance = () => {
   instance = new (Vue.extend(VanDialog))({
-    el: document.createElement('div')
+    el: document.createElement('div'),
+    // avoid missing animation when first rendered
+    propsData: {
+      lazyRender: false
+    }
   });
 
   instance.$on('input', value => {