Upstate1618 Is this intended behavior?
I'm not sure what your setup is, so I don't know for sure. If you've set up a fingerprint and didn't disable using it to unlock the profile then, yes, this is expected after the first unlock after a reboot.
Upstate1618 then why the most of the times when I switch to my owner profile I'm asked for my PIN?
I have a similar quirk with my phone. It pops up with a PIN or password prompt after switching profiles, but, if dismissed, I can still use my fingerprint to unlock.
Upstate1618 Can I log out my owner profile when switching to a secondary profile?
No. Here's a quote from the website:
The owner profile is special and is used to store sensitive system-wide operating system data. This is why the owner profile needs to be logged in after a reboot before other user profiles can be used.