diff --git a/backend/src/main/resources/db/migration/V5__auth.sql b/backend/src/main/resources/db/migration/V5__auth.sql
index 445ed36dd9..befd3499c9 100644
--- a/backend/src/main/resources/db/migration/V5__auth.sql
+++ b/backend/src/main/resources/db/migration/V5__auth.sql
@@ -333,7 +333,7 @@ DECLARE oTempChild VARCHAR(8000);
 
 SET oTemp = '';
 
-SET oTempChild = CAST(parentId AS CHAR);
+SET oTempChild = CAST(parentId AS CHAR CHARACTER set utf8mb4) COLLATE utf8mb4_general_ci;
 
 WHILE oTempChild IS NOT NULL
 
@@ -366,7 +366,8 @@ DECLARE oTempChild VARCHAR(8000);
 
 SET oTemp = '';
 
-SET oTempChild = CAST(parentId AS CHAR);
+SET oTempChild = CAST(parentId AS CHAR CHARACTER set utf8mb4) COLLATE utf8mb4_general_ci;
+
 
 WHILE oTempChild IS NOT NULL
 
@@ -420,7 +421,7 @@ DECLARE oTempChild longtext;
 
 SET oTemp = '';
 
-SET oTempChild = CAST(parentId AS CHAR);
+SET oTempChild = CAST(parentId AS CHAR CHARACTER set utf8mb4) COLLATE utf8mb4_general_ci;
 
 WHILE oTempChild IS NOT NULL
 
@@ -453,7 +454,7 @@ DECLARE oTempParent longtext;
 
 SET oTemp = '';
 
-SET oTempParent = CAST(childrenId AS CHAR);
+SET oTempParent = CAST(childrenId AS CHAR CHARACTER set utf8mb4) COLLATE utf8mb4_general_ci;
 
 WHILE oTempParent IS NOT NULL
 
diff --git a/frontend/src/components/canvas/components/Editor/Preview.vue b/frontend/src/components/canvas/components/Editor/Preview.vue
index 07db29246d..2dbc6c18d3 100644
--- a/frontend/src/components/canvas/components/Editor/Preview.vue
+++ b/frontend/src/components/canvas/components/Editor/Preview.vue
@@ -108,7 +108,9 @@ export default {
   },
   computed: {
     customStyle() {
-      let style = {}
+      let style = {
+        width: '100%'
+      }
       if (this.canvasStyleData.openCommonStyle) {
         if (this.canvasStyleData.panel.backgroundType === 'image' && this.canvasStyleData.panel.imageUrl) {
           style = {
@@ -266,6 +268,7 @@ export default {
   .main-class {
     width: 100%;
     height: 100%;
+    background-size: 100% 100% !important;
   }
 
   .custom-position {
diff --git a/frontend/src/views/panel/export/PDFPreExport.vue b/frontend/src/views/panel/export/PDFPreExport.vue
index f5fcf1a382..99f410c3bf 100644
--- a/frontend/src/views/panel/export/PDFPreExport.vue
+++ b/frontend/src/views/panel/export/PDFPreExport.vue
@@ -97,7 +97,8 @@ export default {
           const contentWidth = canvas.width
           const contentHeight = canvas.height
           const pageData = canvas.toDataURL('image/jpeg', 1.0)
-          const PDF = new JsPDF('p', 'pt', [contentWidth, contentHeight])
+          const lp = contentWidth > contentHeight ? 'l' : 'p'
+          const PDF = new JsPDF(lp, 'pt', [contentWidth, contentHeight])
           PDF.addImage(pageData, 'JPEG', 0, 0, contentWidth, contentHeight)
           PDF.save(_this.panelName + '.pdf')
           _this.$emit('closePreExport')