In some cases, you will not be asked to enter a Profile Lock PIN.
Some devices can't be updated to require a PIN to enter locked profiles. On these devices:
The Profile Lock PIN isn't required to access a locked profile, but is required to watch TV shows or movies in that profile.
You can’t add new profiles if a PIN is required to add profiles to the account.
Some web browsers will automatically open a locked profile when you sign in.
The web browser remembers the last profile you used, and automatically opens that profile.
Your account password is still required to sign in and access the locked profile.
Anyone with your password can change parental controls.
Clear the cookies on your web browser if you don't want to be automatically signed in to the last used profile.