Siri is not sure who i am

Siri doesn’t learn the people’s voices in my home.

Recognise my voice on home app / homepod is turned on.

Hey Siri is turned on.

Siri is turned on in icloud.

There is two people in my home (girlfriend and me). Both have same Siri language (English South Africa) and same settings. Both iPhone’s are on iOS 17.7. HomePods are on 18.0

I tried deleting her from the Home, resetting Hey Siri etc. none worked.

What is odd is that when I ask for my reminders list, Siri will respond correctly. However, if my girlfriend asks for her reminders, Siri will answer with my (boyfriend) reminders?

When I ask Siri who I am, she will say I’m not sure. When I ask Siri to play Spotify, she will she that she is not sure who this is.