Game Mechanics: Monk fd bug

[tyrant49333]

Over the last 2 weeks I have noticed what I believe is a bug with fd. Numerous times a day, fd is failing with no fd message. This seems to happen only when non caster mobs are actively hitting you. When you fd, a mob is still able to get one hit in and fd breaks and the mob reengages. I have been monking on the server for about a year and a half and confirm that it has never done this before.