diff --git a/src/Obj/Base/BillboardObject/index.js b/src/Obj/Base/BillboardObject/index.js
index 4531fa4..5355c9f 100644
--- a/src/Obj/Base/BillboardObject/index.js
+++ b/src/Obj/Base/BillboardObject/index.js
@@ -198,7 +198,9 @@ class BillboardObject extends Base {
 
     this.#_destroyMouseEvent = () => {
       this.attributeElm && (this.attributeElm.style.pointerEvents = 'unset')
-      this.sdk.viewer._element.onmousemove = null
+      if(this.sdk && this.sdk.viewer && this.sdk.viewer._element) {
+        this.sdk.viewer._element.onmousemove = null
+      }
       document.removeEventListener('mouseup', this.#_destroyMouseEvent)
       document.removeEventListener('mouseleave', this.#_destroyMouseEvent)
     }
diff --git a/src/Obj/Base/TextBox/index.js b/src/Obj/Base/TextBox/index.js
index 082e9b3..d957250 100644
--- a/src/Obj/Base/TextBox/index.js
+++ b/src/Obj/Base/TextBox/index.js
@@ -282,6 +282,7 @@ class TextBox extends Base {
     if (this.textDom && this.textDom.parentNode) {
       this.sdk.viewer.cesiumWidget.container.removeChild(this.textDom);
     }
+    await this.sdk.removeIncetance(this.options.id)
   }
 
   flicker() { }