GM replied that this is not a BUG,
combat mode / pk / akamanah / zariche anyone can teleport.
Game decrease ;p
Hello,Regarding your inquiry, I've verified that it is intended that you may used Teleport even if you're in combat mode. However, If you think improvements could be made to the mechanics behind this, we encourage you to post your comments on the forums, where our Community Team gathers player feedback so they can suggest game improvements to our development team: https://forums.lineage2.com/