There is an issue that exists where a Sway embedded into a web part of a Sharepoint site will not allow the user to click or hover over the web part and scroll through the Sway document. Instead the entire page, both the Sway and the site page, scroll simultaneously when using a mouse wheel. Holding the shift key and scrolling, clicking the web part and using arrow keys, and scrolling with the mouse wheel in accessibility mode all work properly. According to a reply to my support request on the MS Forum, there is nothing that currently can be done about this. I would like to see this fixed, as using Sway to create embedded web parts on Sharepoint sites is really a fantastic tool.