Name is locked to Xbox Live Gamertag on Windows 10 Beta

You can't change your username from your XBL Gamertag to something else. Most servers don't allow usernames with spaces. I'm an idiot who chose to have a space in his XBL gamertag. In this case, there is 3 ways. 1) Not being able to play MC:W10E online 2) paying $9.99 to just remove a space from my name. I'll not do such thing as I don't like spending money because of a bug. 3) This bug gets fixed, either by allowing users to change their usernames, or removing unsupported characters in usernames while joining servers or by allowing the characters allowed in a XBL Gamertag in Minecraft Pocket Edition servers.