*VIDEO* Widget not hidden On Begin Cursor Over (Mesh)

As seen below in the video, why does “not Set Hidden On Begin Cursor Over” work for “(EnemyUIWidget)” but not the exact same Blueprint with “(Mesh)” for me?

Also while I’m here - does anyone have a link to a tutorial for highlight meshes On Begin Cursor Over? Would like to give a little white or red outline on enemies when I hover over them. Thanks