Guild Wars 2

Elementalist -> Scepter -> Water Atunement.

Casting Shatterstone while using autoattack will cause shatterstone to autointerrupt itself at about 99% of the casting time. That makes it pretty much unusable in combat since you need to stop autoattacking.
Same problem comes with Flamewall (Focus -> Fire Atunement).

This was confirmed by a guildmate for pve and pvp.

Yeah, I decided to roll an elementalist and give the profession a shot this morning and I am running into this same issue. Having some trouble in the starting zone with shatterstone and flamewall not working.

It seems neither of those spells will cast appropriately while auto-attacking. It goes through the cast animation but the spell just doesn’t cast.

Yeah there are a couple of threads about this, but it’s also not restricted to shatterstone, it’s happening with flamewall as well.