DRK - Plunge bug

Time: July 11, 2015 4:55am PT
Frequency: Occasional
World name: Exodus
Character name: Scruffy Twopointoh
NPC name: N/A
Monster name:Amphiptere
Class/Level: DRK 55
Party or solo: Solo
In-game time: Unknown
Area and coordinates: Churning Mists 16,33
Steps:
1. Started off the fight with an Unmend
2. Immediately followed by Plunge
3. See animation, no damage and no cool down for plunge.

https://youtu.be/O9UD2OOAA38

Connection Specs
- Type of internet connection/provider
- Xfinity/ Technicolor TC8305C

Model Number of the PlayStation®3 You Are Using
- Model Number:

Model Number of the PlayStation®4 You Are Using
- Model Number: CUH-1001A

Model Number of the PlayStation®Vita You Are Using
- Model Number:

Information About the Peripherals You Are Using
-Type:
-Maker:
-Model Number: