skin stays alex

This report is a duplicate of MC-101579, which was later resolved as invalid. The reason for this is because, this issue is most likely caused by malware or other software, that is interfering with Minecraft. In order to fix the issue, I'd recommend reading through the Moderator Note attached to the parent ticket (MC-101579), and if the problem still persists after following the provided instructions, please contact Community Support as the bug tracker is unable to provide you with assistance.