Trail elbow on the downswing

Since my last V1 lesson I’ve been working on keeping my arms together and not early rotating (pronating I think) my forearm on the takeaway. As a result there’s been some weird things going on with my elbow on the downswing. I think whatever I’m doing is causing me to delay my arm from folding and my elbow to get too far behind me or being detached from my side. Is there anything you can add about the elbow in the downswing? I was studying Charlie here and trying to pick up something from him. his elbow is noticeably more towards his anterior