diff --git a/src/window.cpp b/src/window.cpp
--- a/src/window.cpp
+++ b/src/window.cpp
@@ -1447,8 +1447,8 @@ void Window::FindWindowPlacementAndResiz
 		ResizeWindow(this, enlarge_x, enlarge_y);
 		/* ResizeWindow() calls this->OnResize(). */
 	} else {
-		/* Always call OnResize; that way the scrollbars and matrices get initialized. */
-		this->OnResize();
+		/* Schedule OnResize; that way the scrollbars and matrices get initialized. */
+		this->ScheduleResize();
 	}
 
 	int nx = this->left;
@@ -2050,8 +2050,8 @@ void ResizeWindow(Window *w, int delta_x
 
 	EnsureVisibleCaption(w, w->left, w->top);
 
-	/* Always call OnResize to make sure everything is initialised correctly if it needs to be. */
-	w->OnResize();
+	/* Schedule OnResize to make sure everything is initialised correctly if it needs to be. */
+	w->ScheduleResize();
 	w->SetDirty();
 }
 
@@ -3054,6 +3054,7 @@ void UpdateWindows()
 
 	/* Process invalidations before anything else. */
 	for (Window *w : Window::Iterate()) {
+		w->ProcessScheduledResize();
 		w->ProcessScheduledInvalidations();
 		w->ProcessHighlightedInvalidations();
 	}
@@ -3112,6 +3113,26 @@ void SetWindowClassesDirty(WindowClass c
 }
 
 /**
+ * Mark this window as resized and in need of OnResize() event.
+ */
+void Window::ScheduleResize()
+{
+	this->scheduled_resize = true;
+}
+
+/**
+ * Process scheduled OnResize() event.
+ */
+void Window::ProcessScheduledResize()
+{
+	/* Sometimes OnResize() resizes the window again, in which case we can reprocess immediately. */
+	while (this->scheduled_resize) {
+		this->scheduled_resize = false;
+		this->OnResize();
+	}
+}
+
+/**
  * Mark this window's data as invalid (in need of re-computing)
  * @param data The data to invalidate with
  * @param gui_scope Whether the function is called from GUI scope.