Okay, yeah we should probably record a clean video without the string-messed-up part, since as I said that is definitely a bug but it’s a different one (as far as I know).
When the bow is notched, its aim is determined by the angle between both of your controllers. So if one of them is jerking around wildly, it’s going to cause the bow to go all crazy like that. It’s entirely possible that we need to put in some code that interpolates the position of the bow over time instead of instantly so that we can better accommodate setups that don’t have great tracking. But with a 3 camera setup, I wouldn’t think you would have tracking issues.
I really think what I need to see here is just how your controllers look normally. Like at 2:12, I think they are jerky but it’s hard to tell because you are rotating them so quickly it would hide any issues. Try just having your bow and arrow out, and then just turn your body slowly 360 degrees, and while you’re doing that just sort of slowly move/rotate the arrow and bow around. Does the bow and arrow track that perfectly? (It should I would assume). If so then we can hopefully figure out at what point the jerkiness sets in…
Here is me rotating the bow all kinds of crazy ways and then doing the walking slowly around rotating the bow and arrow like I suggested. As you can see, when rotating it really crazy it does sometimes do a jerk (due to it losing tracking and catching back up), but when I turn around slowly it has no issues.
https://gfycat.com/gifs/detail/BigheartedAssuredIrishterrier
(Also I assume when you recorded that original video you were just aiming like normal and not wildly swinging your arms around or something, haha).