devtrackers.gg
So, let me ask you 1 questions... If this were due to ping, wouldn't it be unusual that the amount that I rubber band is exactly based on how long I've been playing without deaths? And that it starts off just being small, like a fraction of a second, but later can become more than 1 or 2 entire seconds (even though other abilities aren't affected?) That it grows exactly in a linear fashion? All of this while latency always shows as good?
If there is some kind of network issue, it's a lot more subtle and esoteric than just normal lag. Though, I think it's a code issue.
No, it wouldn't be unusual. There could be a second issue that's causing it to get worse but I think the reason it's happening at all is because server and client disagree on player location at a specific time index and the server is snapping the player back intentionally.
I could be wildly wrong about this and without having the server logs, it would be almost impossible to tell.