What OS are you on, give us some information? If you're on Windows 8/8.1 you can try to right-click the IceColdLauncher.exe, go to Properties, then Compatibility, check "Run this program in compatibility mode for" and then select Windows 7.
Name of character you are reporting: Jumprope and Swp Date/Time of incident: 04:52AM Realm Time Reason for report: Bug abusing Zul'Jin. Swp took aggro and got him stuck so that he and Jumprope could attack him without getting hit.
Proof: