The UST standards for sidewall height of the rim is 5 or 6 mm. The American Classic rims have a 3mm sidewall height, but American Classic and Schwalbe both claim they are compatible with each other.
We now have had 4 of these tires blow off the rims of our customers, but fortunately all where when mounting or after riding and the bike was in the car or garage (messy, but no injuries thankfully). All of these tires were installed at our shop and none of these tires were over pressured. After each one blew, the bead on the side that blew off was easy to reinstall by hand, seeming to indicate the bead seemed to have stretched.
I have to say that with Schwalbe saying there is no defect, we have to assume all future tires will risk having the same problem so we will no longer installing this combination. On American Classic rims we are 100% problem-free with Compass and Challenge tires so that is what we are going to recommend.