I'm not sure whats causing it but its the only disc I've found that doesn't report correctly. ${Me.CombatAbility[CycloneBlade]} reports 22, and ${Me.CombatAbility[22]} reports cyclone blade, its just ${Me.CombatAbilityReady[]} and ${Me.CombatAbilityTimer[]} that fail for this one disc.
I've checked it on multiple machines here, anyone else able to reproduce?

