top level menus not behaving as expected

As I normally export Artboards out of XD, I select them and then go to the File Menu and choose Export. As I attempt this maneuver, the focus of the Menu switches automatically and begins to cycle through all of the Menu headers. As I try to access a different Menu, another random Menu is placed in focus. Even when I do manage to get the intended Menu to fully drop down, I can not initiate the intended command. This isn't happening with any other app. I have included a video showing this behavior.