diff --git a/internal/ingress/controller/template/template.go b/internal/ingress/controller/template/template.go
index ae5e199bd..72de61cc2 100644
--- a/internal/ingress/controller/template/template.go
+++ b/internal/ingress/controller/template/template.go
@@ -115,7 +115,9 @@ func (t *Template) Write(conf config.TemplateConfig) ([]byte, error) {
 		return tmplBuf.Bytes(), nil
 	}
 
-	return outCmdBuf.Bytes(), nil
+	a := make([]byte, outCmdBuf.Len())
+	copy(a, outCmdBuf.Bytes())
+	return a, nil
 }
 
 var (