Interrupt and cooldowns
Actually :
An interrupt is any action that prevents a foe from completing its current action. Skills which are interrupted have a 5 second cooldown before they can be cast again
Source : http://wiki.guildwars2.com/wiki/Interrupt
So I guess this should be reported?
Sounds like a valid bug.
“I care nothing for a festering industry that wantonly refuses to
provide a service that I’m willing to purchase.” – Fortuna.7259
provide a service that I’m willing to purchase.” – Fortuna.7259
If it’s happening to Earthquake it sounds like a bug, but I fear it may be working as intended on Churning Earth since it does stuff as soon as you start casting.
Churning Earth is channeled, not cast.