Same thing happens to me, and speaking of Facebook......,
I was unable to login to game today and was having various other tech issues.....I deleted game and re-installed, i was able to restore lifetime purchase but cannot log into game using the "use Facebook" option. I never registered with an email when i got app i have always used the login with Facebook option. PLEASE HELP I WANT TO PLAY!!!!!!
Also when I restore iOS tells me that I have already made this in app purchase but it hasn't downloaded. What does this mean?