Don't switch servers and it won't happen, stick to the same server.
Fri, Oct 1
Sep 14 2021
If you select this specific character that is related to that specific server in main menu and press the Rename button to rename the character, do you still have the issue? Keep in mind that community servers use their own database for each specific character and that you have to rename the character that is tied to that specific server.
You need to rename yourself in the Dayz launcher NOT in game. Almost all community servers discord general chats or support will tell you this. Many have an automatic bot response for people who ask.