Items controlled by a UIGridLayout or UIListLayout lag behind when their parent is being tweened.
(Click GIF to see it move)
Here, the “CAPACITY” label is an ordinary Frame that’s not being controlled by any UILayout or UIConstraint. The row of boxes above it are being controlled by a UIListLayout and the boxes below it are being controlled by a UIGridLayout. You can see that all the boxes lag behind the CAPACITY label when the big Frame that holds everything is tweened.