>>6014441I'm mainly a traditional artist, I've known about this technique but never bothered getting a mirror to check it out. When I work on my tablet for commissions I have tried flipping it and I never had this issue. Ever.
I've wondered what I was doing right, but I think I realized it was because I've been ""properly"" constructing my heads before drawing.
You draw that line placement to support where the eyebrows/eyes go and you'll never have this issue again.