How could I stop this from happening? I've tried using the part's CFrame value's in an attempt to keep the part where it is but it keeps jittering back and forth above the object it comes out of.
Here's a link to a video of what's happening: https://streamable.com/1e2oo
Here's the code:
local things = {
Position = Vector3.new(42.3, 1.8, 51.7)
}
local tweeninfo = TweenInfo.new(
2,--Tween time
Enum.EasingStyle.Quad,
Enum.EasingDirection.Out,
1,
true,
2
)
local tween = ts:Create(boxpart,tweeninfo,things)
Many things are pre-defined so there's no issue there.

2 comments
Try setting canCollide on the part that u want to tween (the part that is flying)
it's already off