After the 1.2 had been released, I noticed that my vault disappeared from the save list. Then I checked the game files folder and found there 2 save files. Vault1.sav and Vault1.sav.bkp. I swapped the extensions of these files and after that everything worked perfect for me. Sorry for possible mistakes, English isn't my native language. (LG G Pad 8.3)

Tried that and it worked, thanks !!