I have a (standard) MS Forms webpart on a modern (.aspx) page in SharePoint Online. The form loads fine when viewing the standard URL page, but won't load when viewed on a cross-team-facing URL with ?env=WebViewList at the end (to hide navigation).This happens in both Edge and Chrome, regardless of cache cleanout, etc. There is no error message, it just never shows in the box. When you mouseover, the tooltip says "Loading Microsoft Forms..." All the other embedded web parts on the page work fine (list, library, and Power BI).
URL where it doesn't load: https://tenant.sharepoint.com/sites/subsite/SitePages/folder/pagename.aspx?env=WebViewList
URL where it loads fine: https://tenant.sharepoint.com/sites/subsite/SitePages/folder/pagename.aspx
So far my searches for a solution have not provided any clues. Any insight is greatly appreciated!!