Confuse about Root Effect of Lance Drive

[blackpig1412]

The update review of Ep 9 Rising Force (http://www.cabal.com/UpdateReview/Read/Rising-Force) says that:

- When Root is in effect, afflicted character CANNOT MOVE or use skills related to movement (dash/blink/fade step, I suppose).

- Lance Drive has 70% chance to root for 5 seconds (Lance Drive is the special skill of WA's BM2).

In battle mission, when I have to chase my opponents, I use Lance Drive, and why they still... walk away? (they don't dash anymore, I can knock them down, that's why I am sure that the Root effect is working).

Waiting for the scythe to come back to my hands and approaching my opponent (still walking) most likely take... 3 to 4 seconds, I suppose. Should it be fixed? Or my understanding about Root is wrong ?