Change Username Minecraft. The bug is known by the developers. You can change your username once every 30 days.
Minecraft for windows, consoles, mobile devices and java edition accounts (specifically java accounts purchased after dec 1 st 2020) require that you create an xbox/ microsoft account to login. Want to change your minecraft username? In the bedrock version you can change your username by going into your settings, selecting the profile tab, and selecting change gamertag.