From 300e4155ef49795309b8ef2049e55654dac2d651 Mon Sep 17 00:00:00 2001
From: Vincent Vanwaelscappel <vincent@cubedesigners.com>
Date: Wed, 27 May 2020 19:36:29 +0200
Subject: [PATCH] fix #3661 @1

---
 js/libs/fluidbook/fluidbook.contentlock.js | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/js/libs/fluidbook/fluidbook.contentlock.js b/js/libs/fluidbook/fluidbook.contentlock.js
index 7b805442..29e35701 100644
--- a/js/libs/fluidbook/fluidbook.contentlock.js
+++ b/js/libs/fluidbook/fluidbook.contentlock.js
@@ -130,16 +130,20 @@ FluidbookContentLock.prototype = {
     unlockCurrentPage: function () {
         var $this = this;
         var change = false;
+
+        var unlockEvenPages = !this.fluidbook.mobilefirst.enabled;
+        var currentPage = $this.fluidbook.currentPage;
+
         $.each(this.locks, function (k, v) {
             if (v.unlocked === 1) {
                 return;
             }
-            var currentPage = $this.fluidbook.currentPage;
-            if (currentPage % 2 === 1) {
+
+            if (unlockEvenPages && currentPage % 2 === 1) {
                 currentPage--;
             }
-            var lockPage = k;
-            if (lockPage % 2 === 1) {
+            var lockPage = parseInt(k);
+            if (unlockEvenPages && lockPage % 2 === 1) {
                 lockPage--;
             }
             if (currentPage !== lockPage) {
-- 
2.39.5