Diana Ult Reset Bug [GamePlay]

While attempting to complete Diana's Q -> R combo against a Syndra, she was able to interrupt the ult with her E and Diana's Ult was not reset even though Syndra had the Moonlight Debuff at the time of ulting her.

Reproduce:

1. As Diana, land Crescent Strike on Syndra
2. Ult Syndra
3. As Syndra, Use E to knock back Diana in the middle of the ult
4. DIana's Ult on Cooldown.

Thoughout the game, I was frequently knocked back by syndra in the middle of my ult and was unable to re-engage with the ult for it was on Cooldown even though Syndra had the Moonlight debuff applied before attempting to ult her.

---------------------------- EDIT ------------------------------------------------------------------- Diana ult reset does work when interrupted with Veigar's E.