Hi,
Consult, if they have a test server, is it possible to leave a character in arenaVIP, killing monsters and see that ZEN does not collect?
As an extra piece of information, when the character is at another point where the monsters reappear, for example in this photo, I move to the coordinate 95.43, the monsters follow me, I kill the monsters and I can collect the zen.
My apologies, for my bad english.