In WordPress 6.7 there is a regression in the handling of Blocks that are part of the template but that remain editable.

For example the post title or the post featured image blocks remain editable when they are part of the template when the "Show Template" option is enabled in the editor.

In WordPress 6.7 these blocks now suddenly show a lock icon in their block toolbar. Clicking that allows editors to unlock and then move them.

This moving doesn't get persisted luckily. But it still created a broken editorial experience for users.