I'm particularly asking about the Sorcerer ability Encase (and its morph, Shattering Prison) here, as it feels in some recent play sessions like I have to cast this 2 or 3 times on the same mob(s) before it will "take", but I also remember sometimes having a similar problem on my DK where Talons would just not seem to do anything.
Does anyone know if this is a feature (a function of spell resistance?) or a bug? Feels like perhaps it happens more if there is a large level gap between the mobs and me, which is what got me wondering if they are able to just resist CC from lower level players.