It did! Turns out on dissection that they used a braided steel cable to reinforce the cord. Had endless laughs about how over engineered that one was.
So that is the big shortfall to a lot of these toys, it's basically a planned obsolescence. That said, we've found through research that regular usage and charging practices as well as proper storage can lead to 5-8 year battery reliability. Unlike phones, all of these toys are simple circuits and reliably gentle on batteries.
On top of that, if you're a diy fan you could easily repair then yourself. After disassembly you can reseal the silicone with more body safe silicone that can be purchased in most adult stores in person or online listed under "clone-a-willy" or some variation of. This can also be used to specially modify toys or create them from scratch.