diff --git a/WINGs/wpopupbutton.c b/WINGs/wpopupbutton.c
index 8e982eb..f3613c3 100644
--- a/WINGs/wpopupbutton.c
+++ b/WINGs/wpopupbutton.c
@@ -516,6 +516,13 @@ static void popUpMenu(PopUpButton * bPtr)
 static void popDownMenu(PopUpButton * bPtr)
 {
 	W_UnmapView(bPtr->menuView);
+	/* Clear interactive state so the next open starts from a clean
+	 * slate.  insideMenu and highlightedItem must be reset here;
+	 * relying on WME_LEAVE from the NULL/1x1 unmap is unreliable.
+	 * Stale highlightedItem causes the next BUTTON_RELEASE to
+	 * immediately close the popup. */
+	bPtr->flags.insideMenu = 0;
+	bPtr->highlightedItem = -1;
 }
 
 static void autoScroll(void *data)