I've been having issues with this as well, 100% deflect should mean taking no damage. or very minimal, yet I still get hit HARD when using it in PvE/P. That and forest ranger needs work as well seeing how it doesn't do the cooldown.
I believe this is already known and has been posted about repeatedly. https://www.google.com/search?q=cloak+tower+bug+site:nw-forum.perfectworld.com&safe=off&espv=210&es_sm=122
Yeah, I was on my cleric at the time trying to get the upper hand on positioning however those **** trappers had aggroed on me and kept pulling me from target. A MMO is supposed to be fun, not feel like a chore that goes nowhere.