diff --git a/lib/panel/dock.js b/lib/panel/dock.js
index 06e05ac3..59361e51 100644
--- a/lib/panel/dock.js
+++ b/lib/panel/dock.js
@@ -79,6 +79,7 @@ class PanelDock {
         updateConfigHeight = paneContainer.state.size
       }
 
+      this.lastSetPaneHeight = heightSet
       paneContainer.state.size = heightSet
       paneContainer.render(paneContainer.state)