Senna's curse of the black mist interaction with sudden impact

When using sudden impact on Senna, it seems to only take effect when the skill times out, not when it is canceled early by attacking. It says in sudden impact's description it should take effect upon exiting stealth, then attacking, but this does not seem to be the case with curse of the black mist. Is this working as intended?

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

Report as:
Offensive Spam Harassment Incorrect Board