When a Gui object that’s SizeConstraint property is set to Enum.SizeConstraint.RelativeXX is placed inside a frame with AutomaticSize set to Enum.AutomaticSize.Y, the Size property of the frame does not automatically readjust like it should.
The parent frame is still treating the child frame as if the SizeConstraint property was set to Enum.SizeConstraint.RelativeXY which results the parent frame from not scaling down more like it should to accommodate the change in size.
This is also an issue with an element with a UIAspectRatioConstaint inside a scrolling frame with a UIListLayout and AutomaticCanvasSize set to Enum.AutomaticSize.Y