Monk Demolish Skill Bug

Submitting the following bug:

ISP:
Century Link

Type of Internet Connection:
DSL

Internet Connection Speed:
12 Mbps

Date & Time:
11/20/2013 From approximately 9:35 PM to 10:08 PM PST (Note; i have noticed this bug happening for the past week or so)

Frequency:
At random, but there are issues will the skill cooldown will recycle through without doing anything for 2 - 4 consecutive times

Character Name:
Vyncent Ryder

Race:
Race of your character when the issue occurred.
Hyur Midlander Male

World:
Siren

Class/Level:
Monk Level 50

Area and Coordinates:
Various maps wherever combat takes place, but most notably in Wanderer's Palace.

Party or Solo:
Party.

NPC Name:
None.

Monster Name:
All monsters within Wanderer's Palace such as Tonberries, Buzzards, Tonberry King, etc.

In-Game Time:
5:35 AM - 6:08AM Server Time.

Steps:
During combat, when cycling through my various combos, at random times whenever I attempt to use the skill "Demolish", the cooldown will cycle through, however the skill remains highlighted like nothing happened. The skill animation still occurs, however I do not see damage done to the targeted monster, nor does it give a Greased Lightning skill buff.


PC specs:
OS: Windows 8
Processor: AMD A8 - 5500 APU with Radeon(tm) HD Graphics 3.20 GHz
RAM: 8.00GB
System Type: 64-bit Operating System, x64-based processor

Did you use it over a more potent demolish done with buffs up ?