From 3c284afbc2850b7f60a655edffef3b33a203e217 Mon Sep 17 00:00:00 2001
From: "leonid.chernyavskiy" <leonid.chernyavskiy@sibirix.ru>
Date: Wed, 27 Apr 2022 20:07:18 +0700
Subject: [PATCH] * bugfix: invalid slide offset in vertical mode

---
 slick/slick.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/slick/slick.js b/slick/slick.js
index bb94a86d4..6cf41cba7 100644
--- a/slick/slick.js
+++ b/slick/slick.js
@@ -1019,7 +1019,7 @@
             .off('focus.slick blur.slick')
             .on(
                 'focus.slick',
-                '*', 
+                '*',
                 function(event) {
                     var $sf = $(this);
 
@@ -1034,7 +1034,7 @@
                 }
             ).on(
                 'blur.slick',
-                '*', 
+                '*',
                 function(event) {
                     var $sf = $(this);
 
@@ -1149,7 +1149,11 @@
         if (_.options.vertical === false) {
             targetLeft = ((slideIndex * _.slideWidth) * -1) + _.slideOffset;
         } else {
-            targetLeft = ((slideIndex * verticalHeight) * -1) + verticalOffset;
+            if (_.slideCount <= _.options.slidesToShow) {
+                targetLeft = 0;
+            } else {
+                targetLeft = ((slideIndex * verticalHeight) * -1) + verticalOffset;
+            }
         }
 
         if (_.options.variableWidth === true) {