Game Mechanics: Fear instantly breaks

[finalgrunt]

I've noticed this. Sometimes when I cast fear on a mob, it instantly breaks. But if I recast fear right after, it will instantly break over and over.

For example, if I use the Staff of Dreaded Gaze, and notice an instant break, recasting (spell this time) Invoke Fear will always result in a new instant break. And from there, if I recast the spell on cooldown, instantly breaks.

Here is an example of a log, this time with Staff of Dreaded Gaze only:

[Fri Dec 09 19:01:17 2011] You feel your life force growing.
[Fri Dec 09 19:01:17 2011] A goblin warrior staggers.
[Fri Dec 09 19:01:18 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:01:18 2011] You can't use that command right now...
[Fri Dec 09 19:01:21 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:21 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:21 2011] A goblin warrior tries to kick YOU, but misses!
[Fri Dec 09 19:01:21 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:24 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:01:24 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:25 2011] You regain your concentration and continue your casting.
[Fri Dec 09 19:01:25 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:01:25 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:01:27 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:27 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:27 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:01:27 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:29 2011] A goblin warrior tries to kick YOU, but misses!
[Fri Dec 09 19:01:30 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:33 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:33 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:33 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:34 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:01:34 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:01:36 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:36 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:37 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:01:37 2011] A goblin warrior tries to kick YOU, but misses!
[Fri Dec 09 19:01:39 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:39 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:42 2011] A goblin warrior hits YOU for 4 points of damage.
[Fri Dec 09 19:01:44 2011] You regain your concentration and continue your casting.
[Fri Dec 09 19:01:44 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:01:44 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:01:44 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:01:44 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:44 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:46 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:46 2011] A goblin warrior tries to kick YOU, but misses!
[Fri Dec 09 19:01:47 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:47 2011] A goblin warrior hits YOU for 26 points of damage.
[Fri Dec 09 19:01:50 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:50 2011] You can't use that command right now...
[Fri Dec 09 19:01:51 2011] You can't use that command right now...
[Fri Dec 09 19:01:51 2011] You regain your concentration and continue your casting.
[Fri Dec 09 19:01:51 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:01:51 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:01:51 2011] You can't use that command right now...
[Fri Dec 09 19:01:51 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:01:52 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:53 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:01:54 2011] A goblin warrior tries to kick YOU, but misses!
[Fri Dec 09 19:01:56 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:56 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:01:57 2011] You can't use that command right now...
[Fri Dec 09 19:01:57 2011] You can't use that command right now...
[Fri Dec 09 19:01:58 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:01:58 2011] You can't use that command right now...
[Fri Dec 09 19:01:58 2011] You can't use that command right now...
[Fri Dec 09 19:01:58 2011] You regain your concentration and continue your casting.
[Fri Dec 09 19:01:58 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:01:58 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:01:59 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:01:59 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:02:02 2011] You begin casting Invoke Fear.
[Fri Dec 09 19:02:02 2011] A goblin warrior kicks YOU for 2 points of damage.
[Fri Dec 09 19:02:02 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:02:02 2011] You feel your strength return.
[Fri Dec 09 19:02:04 2011] a goblin warrior has taken 80 damage from your Bond of Death.
[Fri Dec 09 19:02:05 2011] A goblin warrior tries to hit YOU, but misses!
[Fri Dec 09 19:02:08 2011] A goblin warrior hits YOU for 2 points of damage.
[Fri Dec 09 19:02:09 2011] You regain your concentration and continue your casting.
[Fri Dec 09 19:02:09 2011] Your Invoke Fear spell has worn off.
[Fri Dec 09 19:02:09 2011] A goblin warrior looks very afraid.
[Fri Dec 09 19:02:10 2011] a goblin warrior was hit by non-melee for 80 points of damage.
[Fri Dec 09 19:02:10 2011] A goblin warrior staggers.
[Fri Dec 09 19:02:10 2011] You have slain a goblin warrior!
[Fri Dec 09 19:02:10 2011] Your faction standing with FirionaVie got better.
[Fri Dec 09 19:02:10 2011] Your faction standing with GoblinsofCleavingTooth could not possibly get any worse.
[Fri Dec 09 19:02:10 2011] Your faction standing with GoblinsofMountainDeath could not possibly get any worse.
[Fri Dec 09 19:02:10 2011] Your faction standing with LegionofCabilis got better.