double login required when connecting to another fabric container

Story:
start clean fuse, create fabric and create child container.
When connecting from root to child container, there is login form in angular (in video "connect to asdf").
Filling admin:admin and check save credentials -> saved to localStorage permanently as fabric.username and fabric.password.
Immediatelly after that I get another login form - http basic auth why?.
Captured on video: time 6:50 - double login

Also when in "asdf" container and connecting back to root,
it asks for credentials again. Why? LocalStorage still contains fabric.username and fabric.password.
video time: 12:10 - login prompt when stored credentials