I think that to tell if that is a possibility with a particular cultivar you can tell if you look at enough pictures of it posted by various people around the country. What I do is to Google the cultivar name, followed by the word "iris." Then switch to images in the browser. I just don't buy a cultivar if I see it has that tendency. It gets hot and humid here, so I don't want to see that happening in my garden. As a result, I avoid irises from certain breeders whose lines seem to have that problem. Often I can predict who has bred a particular cultivar just by looking at the awful wayward standards. I won't say who, but it seems to be excessively true of a couple of breeders.
