Pretty much everyone is getting screwed in some way by the massive zergtrains. Abilities that require you to be engaged (WAR Infuriate, etc) might not even work because you aren't even being registered as being on the enemy's hate list, sometimes the mob outright doesn't load, party members are disappearing and can't be targeted by direct heals as a result, etc. Until they discourage or reduce/prevent the zergtrains altogether, don't expect anything to be done about your particular issue.