DupEdge in flatmode results in edges from smoothmode being duplicated:
DupFaceBorder has the same issue:
Also, when moving vertices in one view mode, sometimes display changes to the opposite view mode immediately after. Not sure if Osnaps are affecting this, but that’s when I’ve encountered it.
Example: I move this vertex to the midpoint of the selected line shown…
…and as soon as I release the mouse, I see this:
Update: this issue also happens with _Intersect.
Also: I’ve been getting unintended SubD viewmode toggles fairly often, but I can’t exactly figure out why. Is this a bug, or is it related to my redo settings? I will try setting all three subD view mode commands to “never redo” today to see if it changes anything.