Custom App not working


I recently updated from v12 to v13, then i created a custom app,
bench new-app cusotm_app
bench --site install-app custom_app

it went fine as expected, but now i am trying to define custom methods in of custom_app but are not taking any effect.

also bench --site list-apps is not showing my custom_app.

created new app and its working. but old one still not working, not sure why.