[Gameplay] Rek'Sai can ult twice with Kalista

[Bug] Here if you have a Rek'Sai bonded to a Kalista and both ult, it refreshes Rek'Sai's ult as if it were canceled, but she continues to travel. Allowing her to ult twice within seconds.

Reproduction steps:

1. Have Kalista bond with Rek'Sai.
2. Rek'Sai places a tunnel anywhere on the map.
3. Rek'Sai ults to her tunnel.
4. Kalista ults Rek'Sai during her channel.
5. Rek'Sai flies away with a refreshed ult.