When i make or join server my new skin is not showing, but old skin is

I think that's a Mojang issue, not a create one, if the Steve / Alex skin is showing, make sure, your server is not in offline-mode

This issue has been marked as stale because it has been inactive for 3 weeks. It will be closed if it remains inactive for another 3 weeks.

This issue has been closed since it has been inactive for 3 weeks since it was marked as stale.