Usually I don't chat in my world so I went to a server. I started chatting and notice the chat was covering my health bar. To make sure it wasn't a server bug I went to my creative world and noticed it would end up in the top left, where the health bar would be. I don't have Windows 10 Beta Edition but maybe the developers accidentally coded this into Minecraft Pocket Edition. Otherwise the way to produce this is get a Samsung Galaxy Tab 3, or what I have Samsung Galaxy Tab 3 Lite, then get Minecraft Pocket Edition, then you go to a world and chat. The text will appear on the top left where the health bar would be. If anyone reads this thank you very, very much. Bye.