Hi,
In SAP there's a parameter called login/no_automatic_user_sapstar with default value is 1. If the value is set to 1 automatic login of sap* into SAP system using password PASS won’t be allowed. So try to set the value of the parameter to 0 in both the default profile and the instance profile and restart the instance. Automatic login of sap* with default password will be enabled.
For example my profiles are located in the following path: DRIVE:\usr\sap\SID\SYS\profile and they are called DEFAULT.PFL and SID_DVEBMGS00_HOST
Hope it helps!
Cheers!