Here's a video where I showcase the problem
Sweep missing more than 50% of hits
I made a post previously wondering if I was doing something wrong. After some troubleshooting, it seems the skill itself is, and has been, bugged. There are a few bug reports on the skill -- 1, 2, 3 -- dating back to 2019, talking about the same issue.
The issue being that Sweep, despite having Resolute Technique on, and enemies in the direct path of the sweep - doesn't always hit enemies. It's basically a 50/50 rendering the skill almost useless.
In the clip I'm using a Replica Harvest axe, but had the same issue with a Limbsplit. Its linked to Melee Phys, Brutality, Chance to Bleed, and Swift Affliction. Other items being Tabula, Goldrim, Wanderlust, Feastbind, Carnage Heart, and LC gloves. I tested the skill unlinked, naked, with RT turned on, and the same issue appears. I also tried unspeccing RT, and the same issue appears.
What's also odd is that sometimes it seems enemies are hit after the animation fully completes. This isn't always the case, but after the full swing, maybe a couple frames later, the enemies will become "hit".
I'm not sure if this affects Anomalous Sweep, which is what I was planning on building for. But it seems right now it's best to stay away from it until GGG either patches it, or lets us know if something else is going on with the skill.
EDIT: Just to clear up some stuff. I am on Lockstep. I can also recreate this issue through any mob, and even in act 1 - its not enemies blocking or dodging / evading (I thought this at first, which is what prompted me to travel to RT node).