Bedrock Preview Username and Skin Glitch

Whenever I sign in to the latest Bedrock Preview, it signs me in, but immediately sets my Slim Model custom skin to wide, removes my cape, and displays my username as "skinStandardCust". I know that is placeholder text, but it doesn't explain why it changes my settings on the skin. To clarify, I am being signed into my Microsoft account, and when I click on my profile in game, it shows me that I'm signed in with my username, but anywhere else is the placeholder username.