From 8771c816496c31291f5de26a7faa6865b69c749d Mon Sep 17 00:00:00 2001
From: cjw6k <68166329+cjw6k@users.noreply.github.com>
Date: Sun, 27 Dec 2020 17:24:14 -0400
Subject: [PATCH 1/2] Check event.type in duplicate event bailout

Fixes #5471.
---
 src/input/keyboard/KeyboardPlugin.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/input/keyboard/KeyboardPlugin.js b/src/input/keyboard/KeyboardPlugin.js
index 5d97bfd04c..f66fac1a32 100644
--- a/src/input/keyboard/KeyboardPlugin.js
+++ b/src/input/keyboard/KeyboardPlugin.js
@@ -747,7 +747,7 @@ var KeyboardPlugin = new Class({
             }
 
             //  Duplicate event bailout
-            if (code === this.prevCode && event.timeStamp === this.prevTime)
+            if (code === this.prevCode && event.timeStamp === this.prevTime && event.type === this.prevType)
             {
                 //  On some systems, the exact same event will fire multiple times. This prevents it.
                 continue;
@@ -755,6 +755,7 @@ var KeyboardPlugin = new Class({
 
             this.prevCode = code;
             this.prevTime = event.timeStamp;
+            this.prevType = event.type;
 
             if (event.type === 'keydown')
             {

From 19c28741669f40a6f4855f3bad378032d80c6cca Mon Sep 17 00:00:00 2001
From: cjw6k <68166329+cjw6k@users.noreply.github.com>
Date: Mon, 28 Dec 2020 17:37:54 -0400
Subject: [PATCH 2/2] Added prevType to constructor.

---
 src/input/keyboard/KeyboardPlugin.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/input/keyboard/KeyboardPlugin.js b/src/input/keyboard/KeyboardPlugin.js
index f66fac1a32..4151d47654 100644
--- a/src/input/keyboard/KeyboardPlugin.js
+++ b/src/input/keyboard/KeyboardPlugin.js
@@ -167,6 +167,16 @@ var KeyboardPlugin = new Class({
          */
         this.prevTime = 0;
 
+        /**
+         * Internal repeat key flag.
+         *
+         * @name Phaser.Input.Keyboard.KeyboardPlugin#prevType
+         * @type {string}
+         * @private
+         * @since 3.50.1
+         */
+        this.prevType = null;
+
         sceneInputPlugin.pluginEvents.once(InputEvents.BOOT, this.boot, this);
         sceneInputPlugin.pluginEvents.on(InputEvents.START, this.start, this);
     },