When you sign up to take part in a software beta, you have to expect that there will be issues along the way. After all, betas are unfinished by definition, and the whole point of letting users have access to the software early is to iron out the kinks before launch. This is true of iOS betas as well, and Apple offers an explicit notification before you install a beta to remind you to back up your data and to warn you that the software might have bugs.
