I just had a really wierd interaction with Ornn vs Camille

Yeah. I just had a wierd situation where a Camille CONSISTENTLY stopped me from using Ornn's E to escape. Sometimes...... It looked like all she did was Tactical Sweep..... which is only a slow.

She didn't Hookshot, and the stun from her Hookshot hitting me at the exact second of a Ornn E and stunning him.... shouldn't stop his E from working if already in operation. But my E was literally stopping entirely mid skill.

And this was both pre and post ult.

Any ideas why?

Also, doesn't her ult count as terrain?