Rek'Sai Bug?

Played two games today and in both games on multiple occasions Rek'sai failed to unborrow. She will simply move to the champion and not do anything even when not disabled. People have told me that you must press W in order to unborrow in that case. Which is not what the ability description indicates. Along with that however, Sometimes even pressing W she will not unborrow. I am unsure if this is intentional or not. Just thought I would throw that out there.