Subview opens always a new tab

Why does my subview open a new tab in my browser and does the back button not function?
I was assuming that there would be a floating frame as pop up.

Same for me.

This is the way to do it:

type: button
tap_action:
  action: navigate
  navigation_path: /lovelace/subview name
icon: 'mdi:
name: what you like