When i try to avoid the Dark Bringer's dash using my PB activation, it does avoid the damage, but the PB animation doesn't start and therefore i don't get the PB effects (no S&D for example).
That's normal. When a bringer charges he has an effect to cancel all your attacks and unequip your weapon. And since PB is classed as an attack it cancels it.
Did you gifoie (if you can use techs) for the first charge? Kill him quickly after that. Problem solved.
Although sometimes an indi belra will spawn across the room from a spawn you just finished. You're on HUnl and Jellen wont reach it. Love it when that happens.