I've found an AP21 and an AP23 in the same task.
Luckly, I've been monitoring result files and making a log of their contents, before they're uploaded to PG servers and deleted locally.
Extracted from the log (local time [GMT-3], name of the result file and its contents):
2018/07/17 13:14:27 ap27_1067364_1_0
2018/07/17 13:14:27 23 65259108 339709415854673849
2018/07/17 13:14:27 21 65259175 301574022365942399
2018/07/17 13:14:27 07C78D0300593DED
The task is this one.
Is the last line some kind of residue ?
Values like this always appear in AP27 result files, even when no AP is found.