Build Mode does not work

Hi,

I have been having this issue ever since the new update, I didn't see another thread about this so I have made this one, whenever I go into live mode and click build, all buttons disappear and I can't go back to live mode, I have to go to "manage worlds" but even when I do this it doesn't allow me to click on a house and select play. Is anyone else having this problem? If so does anyone know how to fix it? (On manage worlds before this glitch happens, it still works to go in and out of build mode.)

Thanks in advance,

Vallkri.