Unavailable in current map message spam to death by system message

[sprayscreams]

Server Name: klaipeda

Bug Description :
the system keep spamming “Unavailable in current map” in chat window inside any instance, NON STOP until you leave the instance map

Steps to reproduce the issue :

1. enter any instance, like the lvl100 mission
2. play the instance run
3. ???
4. get SPAMMED to DEATH by the system message in the chat window

[sprayscreams]

UPDATE

upon more testing of my own, I found out one of the causes of this problem.
It is the event cookies.
if you have it in your inventory or used it, it will bug up when you enter the instances. The effect of the item will be deleted and replaced with the system message spam of “Unavailable in current map”.
Also, the more that the system message spam the chat window, the slower / lag the game gets.