Invisible Shaper fight

While fightning shaper that when he spawn portal with mobs and he is having seisure in different part of arena we get to use becouse this is happenig like 3 leauge in row . But on 3 phase zana yells , "come to me exile" no bubble appers so im standing next to her and shaper is porting around but no blue balls . OK maybe there are invisible like the bubble. After stop teleporting im waiting for beam but shaper nowhere to see just sudenly taking damage (propably invisible beam) i frostblink away ok. And then blue balls from bullet hell apear. at once . Bum dead. Pls fix it .