Yes it happens for all URLs. Advanced iFrame Pro?v2022.8, WP 6.1.1, php_version: 8.0.27. The short code does work. However the Advanced IFrame Pro area selector doesn’t actually show the page to select an area so I’ve had to play with it a lot back and forth. FYI- New URL for page https://troop5749.com/troop-5749-shop/ the target URL is https://troop571.info/product-category/troop-5749-shop