From 1a64c0a8034fbf5308b0ac2a5775e349bf557d13 Mon Sep 17 00:00:00 2001
From: Kenn Jacobsen <kja@vertica.dk>
Date: Thu, 31 Jan 2019 11:45:08 +0100
Subject: [PATCH] Fix disappearing media thumbnails

---
 .../src/common/directives/components/umbmediagrid.directive.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Web.UI.Client/src/common/directives/components/umbmediagrid.directive.js b/src/Umbraco.Web.UI.Client/src/common/directives/components/umbmediagrid.directive.js
index 308ffbf00f..0a69533938 100644
--- a/src/Umbraco.Web.UI.Client/src/common/directives/components/umbmediagrid.directive.js
+++ b/src/Umbraco.Web.UI.Client/src/common/directives/components/umbmediagrid.directive.js
@@ -157,7 +157,8 @@ Use this directive to generate a thumbnail grid of media items.
                     item.isFolder = !mediaHelper.hasFilePropertyType(item);
                 }
 
-                if (!item.isFolder) {
+                // if it's not a folder, get the thumbnail, extension etc. if we haven't already
+                if (!item.isFolder && !item.thumbnail) {
 
                     // handle entity
                     if(item.image) {