can we please fix flash

can we lease fix it so that if you flash the ability that hast landed yet does not continue to follow/target you.... the whole thing behind a flash is its supposed to be a short teleport meaning there should be a portion of a sec where you arent there anymore for an ability to target you... this really makes me mad when you flash away from a darius (and you get sufficiently outside his range) but you still get ulted.... this makes no sense and i cant understand why ... like there is nothing flash does for you to avoid an ability sine 75% of abilities follow you.... i know it sounds like im just bitching but if you waste a summoner that takes forever to come back up there should be a little more benefit to it other than "go a certain distance"