Multiple user account protection does not work

Device Samsung s8+ SM-G955F
e/os version e_dream2lte-user 11 RQ3A.211001.001 eng.root.20230312.121513 dev-keys

I enabled multiple users and created a test users.
If i go to security and try to enable a pin or a password, nothing happens and protection is not enabled.
Sometimes the app crashes.
Without some form of password protection, having multiple account is quite useless…
Any help is appreciated.

Many thanks