That's really early for shock issues.I replaced both rear shocks on my 2014 with less than 10k miles on the ODO. There was a rattling noise coming from the left rear side that I could hear at low speeds. I checked everything inside and outside of of the car for any lose bolts, connections, wires, and so on and found none. Then I thought that maybe the plastic cover over the shock was somehow moving against the shock making the noise, but it wasn't that. Dealer was completely clueless. Eventually, I scooped a pair of mechanics ears and traced the noice to the left shock. After taking it off the car, It had no sign of leaking oil and had normal rebound. The ride quality wasn't affected neither. Bought new shocks, they come in pairs, and replaced both. Rattle was gone. Still not exactly sure what was wrong inside of it but was very releaved with the rattle now gone.
It is possible that you have defected shocks but at almost 50k it is not unheard of them needing to be replaced.
I think I paid $40 for shocks, plus my own time in the garage of about an hour. Dealer gave me the typical runaround that they could not replicate the issue after two visits. It wasn't worth my neurons fighting with them.So you paid for the damage. Was it not covered under any sort of warranty?