This may be fixed once you introduce states, but I think component bounding boxes should change height if showing or hiding a layer affects the height of the group.

For example, we have used components to create form fields, with different layers for various states of the component. We have an error state that includes an additional line of text with a description. If we include this error state inside our master "input" component, the height of the component will include the error state height, regardless of if we have the layer turned on or off. This causes us to have to choose between losing the great distance measurement functionality built into XD when building our forms, etc...or creating a separate component specifically for inputs with error states.