it says that it has been changed but when i play it is still alex. if it helps i use an microsoft accout.
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@Avoma i do not have malware or anything interfering with minecraft, but i also play in 1.16.5, i think that is the problem.
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. Please see the Moderator Note attached to the parent ticket to potentially fix this issue.