diff --git a/src/renderer/wg_engine/tvgWgRenderer.cpp b/src/renderer/wg_engine/tvgWgRenderer.cpp
index 1257738c..74d71c48 100644
--- a/src/renderer/wg_engine/tvgWgRenderer.cpp
+++ b/src/renderer/wg_engine/tvgWgRenderer.cpp
@@ -312,6 +312,8 @@ bool WgRenderer::clear()
 
 bool WgRenderer::sync()
 {
+    if (mContext.invalid()) return false;
+
     disposeObjects();
 
     // if texture buffer used