Interrupting Ember While Casting Ultimate Causes Repeat Animation [Bug]

[Kyria]

When my Ember has cast her World on Fire (but is still in the animation = I cannot move yet) and something knocks her down - she then repeats the whole animation. The power is already cast and working, but she gets back up and starts the animation all over again with her ground-pound-thingy. Needless to say this somewhat annoying and wastes valuable Ultimate-time I could have otherwise been slaughtering enemies during. This is a fairly recent thing - although I have experienced it numerous times. I thought Ember was supposed to be immune to knockdown during Ult-casting.

[Feldgrep]

Happens to Saryn also

[Kyria]

Happens to Saryn also

 

Thanks! Hopefully it will get double priority then! :)