Oracle connection using Ole DB and ODBC - delphi

Question

Im trying to make a 32bit oracle connection on a Windows 10 machine using ADO in Delphi 11.2.
For Ole DB I use this connection string:
Provider=OraOLEDB.Oracle;Data Source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=[HOST])(PORT=[PORT]))(CONNECT_DATA=(SID=[SID])(SERVER=DEDICATED)));User ID=[USERNAME];Password=[PASSWORD];
and for ODBC I use this connection string:
Driver={Microsoft ODBC for Oracle};Server=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=[HOST])(PORT=[PORT]))(CONNECT_DATA=(SID=[SID])(SERVER=DEDICATED)));User ID=[USERNAME];Password=[PASSWORD];
I want to use the second connection (ODBC) because a lot of old programs use this to connect to Oracle and I dont want to recompile and change the old code.
My problem is that the OLE DB connection works fine, but the ODBC connection gives a "[Microsoft][ODBC driver for Oracle][Oracle]Error while trying to retrieve text for error ORA-01019." error.
I can also see it tries to resolve the "{Microsoft ODBC for Oracle}" to a MSDASQL provider for the ODBC connection.
Now comes the wierd part.
If I do a simple ADO connection to oracle DB using the OLE DB Connection, then disconnect and then connect using the ODBC connection, then it works fine and connect - until I restart the program.
For connection I use this simple Delphi code using ADO
ADO := TADOConnection.Create(Nil);
Try
ADO.ConnectionString := ConnectionStr;
ADO.LoginPrompt := False;
Try
Try
ADO.Connected := True;
if ADO.Connected then
MessageBox(0, Pchar('Connected to Database.' + sLineBreak + sLineBreak + 'Using Provider: ' + ADO.Provider + sLineBreak + sLineBreak + 'Connection String:' + sLineBreak + ConnectionStr + sLineBreak + sLineBreak + 'Used Conncetions String:' + sLineBreak + ADO.ConnectionString), Pchar('Connected'), MB_OK+MB_ICONINFORMATION);
Result := True;
Except
On E: Exception do
raise Exception.Create('Failed to connect.' + sLineBreak + sLineBreak + 'Using Provider: ' + ADO.Provider + sLineBreak + sLineBreak + 'Connection String:' + sLineBreak + ConnectionStr + sLineBreak + sLineBreak + 'Used Conncetions String:' + sLineBreak + ADO.ConnectionString + sLineBreak + SLineBreak + 'Error:' + sLineBreak + E.Message);
end;
Finally
if ADO.Connected then
ADO.Connected := False;
end;
Finally
ADO.Free;
end;
I suspect the OLE DB initialize something that makes the ODBC connection possible. If I do it the other way around and try to connect to the ODBC first and then the OLE DB, then is gives a "Catastrophic failure." exception.
Anyone have an idea why my ODBC connection is not working (without the wierd OLE DB "hack") ?