diff --git a/framework/core/less/common/Modal.less b/framework/core/less/common/Modal.less
index 59a6acf3b..d338ee955 100644
--- a/framework/core/less/common/Modal.less
+++ b/framework/core/less/common/Modal.less
@@ -47,7 +47,7 @@
   overflow-y: auto;
 
   &-invisibleBackdrop {
-    position: absolute;
+    position: fixed;
     top: 0;
     right: 0;
     bottom: 0;