From a4e6cfe393678b54fff498ab5aa8f3cb2e009bf6 Mon Sep 17 00:00:00 2001
From: alschmiedt <aschmiedt@google.com>
Date: Thu, 10 Dec 2020 09:02:00 -0800
Subject: [PATCH] Fix undo (#4511)

---
 core/events/events.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/events/events.js b/core/events/events.js
index 9ba9f579d..6ce5db37c 100644
--- a/core/events/events.js
+++ b/core/events/events.js
@@ -296,7 +296,7 @@ Blockly.Events.filter = function(queueIn, forward) {
       } else {
         // Collision: newer events should merge into this event to maintain
         // order.
-        hash[key] = {event: event, index: 1};
+        hash[key] = {event: event, index: i};
         mergedQueue.push(event);
       }
     }