[GAMEPLAY] quinn ult staying longer then intended

dear sir/madam rioter, when i was in game i ran in to a bug with the character quinn. The bug occured when i was in my ult form and i just had gotten a kill on an enemy with it. when i got the kill i didnt reactivate my ult. After getting the kill i thought it would be wise to recall. When i was recalling my ult ran out but i still stayed in bird form. I was wondering if this was a bug or an intended since it would be akward having to cancel your recall due to your ult running out.

ps. the link is a video where you can see me prefoming the bug

pps. have a nice day kind regards topteulen,