When playing brand (have noticed this with lux aswell) after stunning tristana she can use her jump which should not happen unless ur gonna make this change to other champ with mobility escape skills (not seen on other may well happen)
it's a dash that isn't stopped by cc. she starts the jump pre-stun so she still gets to her location. not a bug.
Once she starts it she's going to her destination unless you displace her. This is intended, and is consistent across dashes. She is only more obvious than most because of the distance she travels, but you can see this even with the short dash of Lucian.
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Just think of Ezreal vs Blitz. If Ezreal gets hooked while he is casting his E, he's going to get away. Same deal with Trist, the jump cast is uninteruptable, but the jump itself is susceptible to CC, so if you can land CC on her while she is flying, then you will stun her.
