Uh... that's not a bug. That's a un-documented feature. Not sure what the problem is that you have. I have also noticed that my vertices are no longer showing. I've tried changing the display size of the vertices, but still don't show up. I'm thinking I must have accidentally hit a hotkey, as the only way I can see them is…
sometimes also there is a bug soemtimes where if you minimize the viewport, the vertices seem to disappear. i have to reset the display size of the vertex.