diff --git a/wax-prosemirror-services/src/OENContainersService/oenContainers.css b/wax-prosemirror-services/src/OENContainersService/oenContainers.css
index 0b71789bdaa544fbe1cc7b5f8c976054eebf8ea8..56b51bbe43e422a95c6493a83a0c437bb5f01f74 100644
--- a/wax-prosemirror-services/src/OENContainersService/oenContainers.css
+++ b/wax-prosemirror-services/src/OENContainersService/oenContainers.css
@@ -9,6 +9,7 @@ div[data-type="content_structure_element"]::before, aside::before {
     border: 3px solid #f5f5f7;
     background-color: #f5f5f7;
     width: 100%;
+    position: relative;
     display: block;
 }