IMPORTANT! Bug when i getting exp on swamp of screams

when i was attacking a mob, i've had lag, and shortly after, these windows have appeared ...

http://imageshack.us/photo/my-images/818/shot00001vf.png/

 

hi
this was happend every time?
this windows is test option for gm. you can't used it as normal player.
sometime when server is heavy this windows appear, but its very rather.

 

this was the first and only time

 

thank you for response.
like i said sometimes when server is heavy this windows could appear but normal player can't used them.
anyway i'll send notification to technical team.

thank you for report.
best reagrds