Does this an Oracle Optimizer malfunction?

I have a query oo a view like this:

SELECT

SQN,REC_BDTS,SAT_LDTS,SAT_RSRC,SAT_FREQ,REC_EDTS,REC_CRNT_IND,REC_PURGE_IND,TYPE_CD FROM N_IZ6ARD_2_S_TYPES_V

;

Oracle will use NESTED LOOPS OUTER to perform the JOIN.

but once I put "--" in the query like this

SELECT

SQN

--

,REC_BDTS,SAT_LDTS,SAT_RSRC,SAT_FREQ,REC_EDTS,REC_CRNT_IND,REC_PURGE_IND,TYPE_CD FROM N_IZ6ARD_2_S_TYPES_V

;

Oracle will use HASHED LOOPS OUTER to perform the JOIN which performance is much better.  And also this is the right execution plan.