Trap raises with a bent bar. The one where you bend your elbows kinda upwards in the air on the way up. When I do these my form in the mirror doesn't look perfect in the sense that my arms don't look the exact same, however i am not able to notice any major technical issues in the mirror.

My issue is that when I do these, sometimes I can feel what can only be described as a bone on bone grinding feeling in my left elbow. It doesn't hurt, however I am worried that It may do bone/cartilage damage. Am i doing these wrong? How should I fix?