Wow, that's a little scary! These shroud adjusters always make me nervous when they get significantly bent. I have the 10 hole variant, which bends very easily when you're stepping the mast on a trailer and your shroud gets caught under a hull/rudder, or if the twist toggle doesn't rotate as the mast is coming up. Sometimes they get "jammed" and the shroud adjuster folds over as the mast comes up. I'll bend it back and still sail with it, but if it happens more than once or twice, I replace the adjuster. However, I'm a little surprised at the way yours separated! That's not really how I would expect it to break, and with how clean of a separation it was, I almost wonder if it was a defect... looks like either the weld didn't fully penetrate the parent material, or they didn't adequately control temperature and it separated right along the heat-affected zone. Tough to tell without looking much closer. It also looks like it's a pretty old part?
In any case, if any of mine last long enough without getting bent, I may add these to the list of parts to replace every handful of years