Bug for Tristana's Rocket Jump

I have had an increasingly frustrating time fighting Trist in lane. Champions with stuns or snares CANNOT stop Tristana's jump. Even though, she has been hit. For example, Tristana gets CC'd by a Leo or Annie and the jump continues through regardless. Tristana will remain stunned throughout her jump and even land stunned, but the jump itself won't be stopped or interrupted [before she jumps] by CC. So, the animation for her jump continues through duration the CC and less than a second, after she lands, she walks away like nothing happened in the first place. Is anyone else having this problem?
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