...ok, forgot to say, that I used the old drafts list. ;-)
Using the new list, I can see the time of the log, thanks for the hint!
And, the time is 12:00 o'clock for all drafts. :-( So, it seems, there is something wrong with the field notes created by Locus. I checked the list on my phone and also there, the time is wrong. Funny about this: the behavior changed sometime between 30 Sept 18 00:17 (where the time was still present) and 30 Sep 18 18:00, where all following drafts have 18:00 as time.
Sounds funny, but I did not update any software on my phone during our 3 week trip... and now, almost 200 drafts are messed up... :-(
Anyway, thanks for your replies.
Cheers, bigchen.