Repro

To repro the issue

clone the app
create a database and configure it in your .env file
run the migrations
start app via php artisan serve
create a user, e.g. via tinker User::create(['name' => 'test test', 'email' => '[email protected]', 'password' => '111111111'])
browse to http://localhost:8000/nova/login and login with the user credentials you just created
browse to http://localhost:8000/nova/resources/orders and create a new order
go back to the index view and hover the mouse over the user relationship. A window opens and you can peek at the email address of the user that is associated with the order.
now go to http://localhost:8000/nova/resources/orders/lens/order-lens. The same index view is provided. Hovering over the username doesn't open the window with the user's email address however. Peeking doesn't seem to work.
If you open the Chrome Dev Tools you'll see that without a lens a peek request is made ( http://localhost:8000/nova-api/users/1/peek). With a lens the peek request is not made.

Code Changes made on top of a default Nova install:

Name		Name	Last commit message	Last commit date
Latest commit History 3 Commits
app		app
bootstrap		bootstrap
config		config
database		database
lang/vendor/nova		lang/vendor/nova
public		public
resources		resources
routes		routes
storage		storage
tests		tests
.editorconfig		.editorconfig
.env.example		.env.example
.gitignore		.gitignore
README.md		README.md
artisan		artisan
composer.json		composer.json
composer.lock		composer.lock
laravel		laravel
package.json		package.json
phpunit.xml		phpunit.xml
vite.config.js		vite.config.js