Never heard about such a problem before.I have been very happy with 350 hubs with the older star ratchet design. Does anyone know if this is a common problem with the new hub design?
I have a Vala X0 with the same hub and now 120 miles on it. No issues at all. This is my third DT Swiss ratchet hub and I have done a total of 10,000 miles on those. They only needed a bearing service, but never a new ratchet ring.
The new DEG version should be even more reliable. The ratchet ring has a much larger diameter and can distribute the load over more teeth. I would guess the failure of your hub is due to a manufacturing/material fault and should be covered by warranty.
See the DT Swiss website on their ratchet technology: Ratchet Technologies Overview | DT Swiss | DT Swiss