diff --git a/dist/Spine-v1.36.3.c3addon b/dist/Spine-v1.36.3.c3addon
new file mode 100644
index 0000000..d41121a
Binary files /dev/null and b/dist/Spine-v1.36.3.c3addon differ
diff --git a/src/addon.json b/src/addon.json
index 43bba0a..91bb300 100755
--- a/src/addon.json
+++ b/src/addon.json
@@ -3,7 +3,7 @@
   "type": "plugin",
   "name": "Spine",
   "id": "Gritsenko_Spine",
-  "version": "1.36.2",
+  "version": "1.36.3",
   "author": "Mikal and Igor Gritsenko",
   "website": "https://gritsenko.github.io/c3_spine_plugin",
   "documentation": "https://gritsenko.github.io/c3_spine_plugin",
diff --git a/src/c3runtime/instance.js b/src/c3runtime/instance.js
index b3aec82..5af3c7b 100644
--- a/src/c3runtime/instance.js
+++ b/src/c3runtime/instance.js
@@ -425,6 +425,17 @@
         }
 
         IsSpineReady() {
+            // Guard for case where sdkType does not exist (deleted on release)
+            if (this.sdkType === null || this.sdkType === undefined)
+            {
+                if (this.debug) console.warn('[Spine] IsSpineReady, sdkType not defined', this.sdkType);
+                if (globalThis.Sentry)
+                {
+                    globalThis.Sentry.captureException('[Spine] IsSpineReady, sdkType not defined:'+this.sdkType);
+                }
+                return false;
+            }
+
             if (this.isSkeletonLoaded) {
                 return true;
             }
diff --git a/src/c3runtime/spine-draw.js b/src/c3runtime/spine-draw.js
index 873d3b0..7a43e2a 100644
--- a/src/c3runtime/spine-draw.js
+++ b/src/c3runtime/spine-draw.js
@@ -305,6 +305,6 @@ class SpineBatch {
 
 if (!globalThis.spineBatcher)
 {
-    console.log('[Spine] SpineBatcher init, 1.36.2');
+    console.log('[Spine] SpineBatcher init, 1.36.3');
     globalThis.spineBatcher = new SpineBatch();
 }
\ No newline at end of file
diff --git a/src/plugin.js b/src/plugin.js
index 034feda..4be3929 100755
--- a/src/plugin.js
+++ b/src/plugin.js
@@ -3,7 +3,7 @@
     const C3 = self.C3;
     
     const PLUGIN_ID = "Gritsenko_Spine";
-    const PLUGIN_VERSION = "1.36.2";
+    const PLUGIN_VERSION = "1.36.3";
     const PLUGIN_CATEGORY = "general";
 
     const PLUGIN_CLASS = SDK.Plugins.Gritsenko_Spine = class SpinePlugin extends SDK.IPluginBase {