diff --git a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatInspector.java b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatInspector.java
index 000ef92b..90ca0f27 100644
--- a/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatInspector.java
+++ b/flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatInspector.java
@@ -216,6 +216,9 @@ public class FlatInspector
 
 		this.enabled = enabled;
 
+		// make sure that glass pane is not opaque, which is not the case in WebLaF
+		((JComponent)rootPane.getGlassPane()).setOpaque( false );
+
 		rootPane.getGlassPane().setVisible( enabled );
 
 		Toolkit toolkit = Toolkit.getDefaultToolkit();