diff --git a/frontend/src/components/canvas/components/Editor/index.vue b/frontend/src/components/canvas/components/Editor/index.vue
index e2e7b17f93..220fd6f346 100644
--- a/frontend/src/components/canvas/components/Editor/index.vue
+++ b/frontend/src/components/canvas/components/Editor/index.vue
@@ -296,7 +296,7 @@ function fillPositionBox(maxY) {
 function removeItemFromPositionBox(item) {
   const pb = positionBox
   // console.log('removeItem=>x:' + item.x + ';y:' + item.y + ';sizex:' + item.sizex + ';sizey:' + item.sizey)
-  if (item.x <= 0 || item.y <= 0) return
+  if (!item || item.x <= 0 || item.y <= 0) return
   for (let i = item.x - 1; i < item.x - 1 + item.sizex; i++) {
     for (let j = item.y - 1; j < item.y - 1 + item.sizey; j++) {
       if (pb[j][i]) {
diff --git a/frontend/src/components/canvas/index.vue b/frontend/src/components/canvas/index.vue
index bbdf3fc9fb..201d42e639 100644
--- a/frontend/src/components/canvas/index.vue
+++ b/frontend/src/components/canvas/index.vue
@@ -55,7 +55,7 @@ export default {
   created() {
     this.restore()
     // 全局监听按键事件
-    listenGlobalKeyDown()
+    // listenGlobalKeyDown()
   },
   methods: {
     restore() {
diff --git a/frontend/src/views/panel/SubjectSetting/PreSubject/Slider.vue b/frontend/src/views/panel/SubjectSetting/PreSubject/Slider.vue
index f26f152376..48f0109df6 100644
--- a/frontend/src/views/panel/SubjectSetting/PreSubject/Slider.vue
+++ b/frontend/src/views/panel/SubjectSetting/PreSubject/Slider.vue
@@ -12,7 +12,7 @@
       <el-col :span="20">
         <el-row id="slider">
           <div class="window">
-            <ul class="container" :style="containerStyle">
+            <ul v-if="!slidersLoading" class="container" :style="containerStyle">
               <li>
                 <div style="width:240px; height: 208px;overflow: hidden">
                   <subject-template-item
@@ -156,6 +156,7 @@ export default {
     querySubjectWithGroup() {
       this.slidersLoading = true
       querySubjectWithGroup({}).then(response => {
+        this.sliders = []
         this.sliders = response.data
         this.slidersLoading = false
       }).catch(() => {