Erratic behaviour map operation after table comparison

BODI XIR2 11.7.3.6

We want to detect and store changes in source data and store these changes in the target table.

After the table comparison the row has got an update operation code flag and goes to a Map operation that converts Update row types to Normal and discards all other row types.

normal -> discard

update -> normal

insert -> discard

delete -> discard

The map operation behaviour is erratic: sometimes the update row is mapped to normal and sometimes the update is discarded.