I'm just posting to see if anyone else has solved the issue on the 2019 Models. I took the seat back off and did a little bit of investigation. I think the Plastic clip we're seeing may actually be a part of the new "headrest guide" that came with this model. I can't find the current part on Mopars page, but here is the old headrest guide (parts.donjacksoncdj.com/oem-parts/mopar-headrest-guide-5rn60dx9ad?c=Zz1ib2R5JnM9c2Vjb25kLXJvdy1zZWF0cyZsP TEwMiZuPUFzc2VtYmxpZXMgUGFnZSZhPWNocnlzbGVyJm89cGF jaWZpY2EmeT0yMDE5JnQ9bGltaXRlZCZlPTMtNmwtdjYtZ2Fz) . (Sorry for the ridiculous long URL, new posters can't submit links apparently). I'm no expert, but it looks like the plastic clip may be a redesigned part of this, rather than what is holding the headrest rod in. I can't seem to figure out how the rod is being held in though, at least not without a full service manual.