recent patch notes said that the Patrol trial event is fixed, but I can report that it's still just as broken as it was before the patch.
Clearing the trial primer after defeating the group will make you in-elligible for the Koda be Praised achievement
(and some people report that even if you clear the primer before the group has been cleared is no guarantee of elligibility, either)
for me this is extremely frustrating because the event already has such a slow re-occurance rate, without a timer, meaning you spend 2 hours AFK'ing watching with the map open, otherwise you'll miss it.. which is another problem with this event design
To defeat the dragons, see the good in them.
Zhaitan reunites lost ones, primordus creates fertile land, mordremoth spreads the green, and jormag..
..jormag? Who's that?