I'm sure I've seen something similar to this before. It doesn't happen often, but I've seen it more than once and wondered what the deal is myself. In my case:
1. Voidsatar, me (Shadow) head to head against an Imp Sorcerer
2. He has no resolve bar, he's throwing lightening at me.
3. I hit Force Stun, my cooldown goes off so I know it actually triggered - Sorc. is not stunned, nothing happens, he's still throwing lightening.
4. I think maybe i don't have him targeted so I look - he's targeted. I target him again for safe measure.
5. I hit Force Lift. My cooldown goes off so I know it actually triggered - Sorc. is not lifted, nothing happens, he's still throwing lightening. I still have him targeted.
6. I hit TK throw to see if I can hit him with ANYTHING - yep, I see him take some damage from this.
7. I die.
I actually read through the whole sorcerer ability tree after this round, convinced that there was some ability I didn't know about that let him be immune to CC's for some period of time... couldn't find one.