MicroStation Connect: Unable to connect to an Oracle database 19C

Windows 10 Pro, 20H2

MicroStation V8, 32 bit (Scenario 1):
MicroStation V8i (SS10), Version 08.11.09.919, English
Oracle Client: , Version 12.2.0.1.0
Oracle Server: Oracle Database 18c Express Edition , Version 18.4.0.0.0

MicroStation Connect, 64 bit (Scenario 2):
MicroStation Connect Update 14, Version 10.14.00.109, English
Oracle Client:. Version 19.0.0.0.0
Oracle Server: Oracle Database 19c Enterprise Edition , Version 19.3.0.0.0

In each scenario the following environment variables are set on system level (OS):

Scenario 1:
ORACLE_HOME = C:\oracle32\product\12.2.0\client_1
PATH = C:\oracle32\product\12.2.0\client_1\bin

Scenario 2:
ORACLE_HOME = C:\oracle\product\19.0.0\client_1
PATH = C:\oracle\product\19.0.0\client_1\bin

In each scenario the following MicroStation configuration variables are set:

MS_DBDLM = 1
MS_LINKTYPE = ORACLE
MS_NOMSFORMSTABLE = 1
MS_ORACLE_HOME = c:/oracle32/product/12.2.0/client_1 (Scenario 1)
MS_ORACLE_HOME = c:/oracle/product/19.0.0/client_1 (Scenario 2)
MS_SERVER : oralddlm
MS_DGNAPPS > server

II'm working with Scenario 1 and with Scenario 2  on the other hand.

In each scenario I'm trying to setup an Oracle database connection by keying in the following command at the MicroStation Keyin window:

ACTIVE DATABASE <user_name>/<password>@<alias from tnsnames.ora>

And these are my results:

Scenario 1:
Database successfully connected.

Scenario 2:
No connection established. I always get the message: Unsuccessful CONNECT statement

In each scenario it is possible to setup a successful database connection by each of the following tools:

tnsping
sqlplus
Oracle Net Manager
Oracle SQL Developer

So, question is: What is going wrong in Scenario 2 inside MicroStation Connect ????

Any hints, suggestions, etc. are very appreciated.

Thanks,

Martin