Moreover, the oscillating Scion is flattening our squad with every Shockwave, regardless of our position, and on the several occasions I've made it past the first platform, the second Scion will glitch up onto cover, giving its own Shockwave a clear line of sight to us. I'll do the animation, the charge animation, and it will look like I've warped over to the enemy I've selected, but when the animation finishes, I'm still standing at my initial position, and the enemy will have taken no damage and will not have been stunned at all, whatsoever. But there's some sort of bug that prevents me from phasing through objects with my charge. The Vanguard usually rips through most enemies like a hot knife through melted butter. And, actually, up until this point, it totally was. Figuring I had hit a wall, and seeing this video, I thought that, maybe, a Vanguard was (surprisingly) the way to go. Especially Harbinger, whose attacks are brutal enough to wipe out your whole squad on his lonesome. That said, I felt like I was firing pea-shooters at the Collectors themselves. For whatever reason, the Shockwave just wouldn't hit us.

With the Sentinel, I had no trouble with the Scion constantly oscillating around our platform. It's a combination of awful design and bad programming. I've tried with two different characters now, a Sentinel and a Vanguard, for a grand total of about four hours and I cannot get past this part whatsoever.

Mass effect collector ship