This is a recent bug with newer versions of Illustrator. When I select an object and scale, the path/edges/anchors disappear. This is EXTREMELY frustrating. See attached video for a better understanding of what I'm talking about. It appears to be a glitch that comes from having GPU accleration enabled on newer M1 Macs. Older versions of Illustrator on my old Nvidia-powered Macbook Pro never had this problem.
For the record, I do have "Show Edges" enabled in the "View" menu.