I have just loaded up the newest version of Minecraft bedrock and I looked up the patch notes to see what was added/changed. I saw that the Steve characters in multiplayer servers was "fixed", so I tested it out as I used to have this glitch, and other people, including me, still appear to everyone else as the Steve skin in multiplayer servers. I am not sure if this patch only affected certain people or if the patch didn't work, but I hope this can get fixed soon!