I got a St. Patrick's Beard many years ago in a trade with David Conner. It never did all that well for me and was mostly typical looking. Then it lost all its leaves when it went into dormancy and Leah thought it was dead and threw it out
I just got another few pieces this year from Jeremiah so I'm interested to see how they do. But yes, St. Patrick's Beard and Cheerleader aren't stable. Nor are any of the "pompom" flytraps that I've grown or heard from others to have grown.
The same is true of Biohazard and some of the more odd-looking flytraps with multiple flanges, including Mirror. It is really neat when they do produce their odd traps, but it seems that it is hard to predict when they will do so! For that reason, we've largely stopped propagating them in favor of the usual looking flytraps that are definitely stable like Freaky Star, Wacky Traps, the BCP dictator series, Triton, Crocodile, Werewolf and a few others.