diff --git a/html/script.js b/html/script.js
index 75c73ab..a4f59c9 100644
--- a/html/script.js
+++ b/html/script.js
@@ -5878,6 +5878,8 @@ function processURLParams(){
         }
     }
 
+    lastRenderExtent = getRenderExtent();
+
     if (urlIcaos.length > 0) {
         const icaos = urlIcaos;
         if (!usp.has('noIsolation'))