I have the same issue, connection is stored in /etc/NetworkManager/systems-connections/ the connection is available to all users, pin is set.
If the device is recognized at bootup time the connection is established without asking the pin.
If I disconnect the device and connect it again, the device is always recognized, then the pin is asked, but if I cancel the dialog the connection is established anyways.
I have the same issue, connection is stored in /etc/NetworkMan ager/systems- connections/ the connection is available to all users, pin is set.
If the device is recognized at bootup time the connection is established without asking the pin.
If I disconnect the device and connect it again, the device is always recognized, then the pin is asked, but if I cancel the dialog the connection is established anyways.