The second part of Barren Blossom seems to be buggy. It's supposed to throw out corruption after you break enough Profound Darkness parts, which then will lead you to fight the white core approaching the small fleet. It never happens. Instead, it just opens said core after a set amount of damage, which looks really odd. It happens until the third part where the corrupted balls just go wherever they want to instead of following a set pattern depending on the HP of the last section of the boss. It also seems to be missing some movements such as the triple lasor shot and the double charge ram(where it goes off-screen and tries to ram you from the side)
If this was a nerf then I also suggest revising it again. A boss should not be this janky and inconsistent in movements.