If you alter a dbms_job on a RAC database, part of the script is missing.
You end up with someting like this…
SYS.DBMS_IJOB.INTERVAL
(job => 4
,interval => 'SYSDATE+5/1440 ');
,instance => 0
,force => TRUE);
When it should be something like this…
SYS.DBMS_IJOB.INTERVAL
(job => 4
,interval => 'SYSDATE+5/1440 ');
SYS.DBMS_IJOB.INSTANCE
(job => 4
,instance => 0
,force => TRUE);
Seen in 12.7.0.121 and 12.5.0.99, probably everything in between too, but not confirmed.