@abaer The modification that broke the ability to embed views/apps/forms was caused by the removal of the X-Frame-Options header for certain routes. This is handled entirely at the reverse proxy layer (= Caddy for default installations) and not within the seatable-server container.
Therefore self-hosted instances are only affected if you’ve upgraded to SeaTable v6.2 between the initial release of v6.2 (July 21) and the latest release made yesterday and you’re using Caddy (or you’ve ported the header changes to your own reverse proxy configuration).