EasyPeezy

Heavy starch and proper pressing helps. I also put a finger on the seam
as it goes under the needle...not right in front of the needle but to the left.
I still get the occasional flipped seam but it doesn't really bother me unless
it's very bulky.

Almost forgot to add that if the seams don't stick I make them stick.
If the fabric had been heavily starched...I dab my finger with a little
water and run it over the seam and press. No flipping.