diff --git a/src/bundle/Resources/public/js/CKEditor/custom-tags/helpers/panel-helper.js b/src/bundle/Resources/public/js/CKEditor/custom-tags/helpers/panel-helper.js
index 72647a91..9c332499 100644
--- a/src/bundle/Resources/public/js/CKEditor/custom-tags/helpers/panel-helper.js
+++ b/src/bundle/Resources/public/js/CKEditor/custom-tags/helpers/panel-helper.js
@@ -1,4 +1,5 @@
 const setPanelContentMaxHeight = (balloonView) => {
+    const HEADER_HEIGHT = 90;
     const { innerHeight: windowHeight } = window;
     const { top: panelTopPosition, element: panelNode } = balloonView;
     const panelHeader = panelNode.querySelector('.ibexa-custom-tag-panel-header');
@@ -11,7 +12,7 @@ const setPanelContentMaxHeight = (balloonView) => {
 
     const panelHeaderHeight = panelHeader?.offsetHeight ?? 0;
     const panelFooterHeight = panelFooter?.offsetHeight ?? 0;
-    const isPanelOverTopWindowEdge = panelTopPosition < 0;
+    const isPanelOverTopWindowEdge = panelTopPosition - HEADER_HEIGHT < 0;
     const maxHeightValue = isPanelOverTopWindowEdge
         ? panelContent.offsetHeight - Math.abs(panelTopPosition)
         : windowHeight - panelTopPosition - panelHeaderHeight - panelFooterHeight;