diff --git a/Editor/ToolbarCallback.cs b/Editor/ToolbarCallback.cs
index 22e90cb..4a665e5 100644
--- a/Editor/ToolbarCallback.cs
+++ b/Editor/ToolbarCallback.cs
@@ -77,6 +77,9 @@ void RegisterCallback(string root, Action cb) {
 						parent.Add(container);
 						toolbarZone.Add(parent);
 					}
+
+					// Handle root visual element being detached from m_currentToolbar when changing between displays of different DPI
+					mRoot.RegisterCallback<DetachFromPanelEvent>(_ => m_currentToolbar = null);
 #else
 #if UNITY_2020_1_OR_NEWER
 					var windowBackend = m_windowBackend.GetValue(m_currentToolbar);