diff --git a/src/components/AiAreaPicker.vue b/src/components/AiAreaPicker.vue
index 6a56abbf..07a98adb 100644
--- a/src/components/AiAreaPicker.vue
+++ b/src/components/AiAreaPicker.vue
@@ -111,7 +111,9 @@ export default {
     fullArea: {
       handler(v) {
         this.$nextTick(() => {
-          this.scrollHeight()
+          if (v) {
+            this.scrollHeight()
+          }
         })
       }
     }
@@ -125,7 +127,7 @@ export default {
       this.$refs.areaSelector.showPopup()
     },
     scrollHeight () {
-      return this.height = `calc(100% - ${document.querySelector('.areaSelector').offsetHeight}px)`
+      return this.height = document.querySelector('.areaSelector') && `calc(100% - ${document.querySelector('.areaSelector').offsetHeight}px)`
     },
     getFullArea() {
       let areaId = this.areaId || (this.all ? '' : this.$areaId)