Scroll bars appearing with Accessible Text when text boxes are set to Resize Shape to Fit Text

Are there any specs to creating text boxes or objects to "accessible text" toggled on? It seems that this toggle moves text boxes down 2-3 pixels randomly and creates scroll bars randomly. I have just looked at the preview version to see the scrollbars. It seems it is providing a specific amount of space after text--I just can't figure out what it is and have no guidance on how to design the screen so it looks the same if this feature is toggled on or off.