diff --git a/src/js/LayoutManager.js b/src/js/LayoutManager.js
index <HASH>..<HASH> 100644
--- a/src/js/LayoutManager.js
+++ b/src/js/LayoutManager.js
@@ -880,7 +880,7 @@ lm.utils.copy( lm.LayoutManager.prototype, {
 		this.root = new lm.items.Root( this, { content: config.content }, this.container );
 		this.root.callDownwards( '_$init' );
 
-		if( config.maximisedItemId ) {
+		if( config.maximisedItemId === '__glMaximised' ) {
 			this.root.getItemsById( config.maximisedItemId )[ 0 ].toggleMaximise();
 		}
 	},
Update LayoutManager.js

From what I can tell on Line <I> you need to check for __glMaximised here. 



Changing to the proposed conditional resolved an issue for me when setting up goldenlayout from a serialized config.