Not all but that is always a concern with crossbows. Lots of stress on very short limbs that are often held at full draw for hours on end. As I always tell folks, it can happen with any brand at any time. Some are more prone to it than others, and if there are limb issues, it usually reveals itself within a year or two, provided the bow is shot some.
I have had two sets go bad on two different brands. Excaliburs are often touted as bulletproof but I have seen a lot of of limb failures lately on them.
Most limbs are made by just a few limb manufacturers. The design of the limb itself and how it is utilized on the crossbows are more at fault than the limb construction.
I support all hunters, regardless of weapon or technique!