Game Mechanics: Slam/bash always interrupts a mob?

[azxten]

I've been playing a Troll SK and noticing how every time my slam racial ability lands it will interrupt a caster. This feels overpowered compared to classic and I recall the slam/bash ability only having a chance to interrupt if it lands rather than a guaranteed interrupt. I regularly go entire fights not letting a caster finish any spells.

Does anyone else remember this functionality? I know we need evidence to confirm but curious what others think.