Guild Wars 2

Abilities like ice spike and eruption are canceled if you’re knocked down. For example, you put down a healing field and eruption for a healing blast combo and just after placing eruption and you get knocked down, nothing happens. No damage from the eruption, no healing from the combo blast.

Same with ice spike, place it over a mob and it’s hovering over it, you get knocked down during the hovering animation and the ice spike is simply nullified.

Happens with dragon’s tooth too and shatterstone as well I think.

It’s sad to see such basic abilities still being bugged all this time.

Those abilities weren’t activated. You should have a short cooldown after this happening, not the long one as if you used the skill. You may see the animation, but you’re still on activation time. That’s not a bug. It’s a bit annoying on certain skills, but it works as intended. They could retwitch it a bit so the animation doesn’t play before the skill ends activating, but it would ruin the visual effect completely :P