Game breaking bug on Undead Nightmare

[ChocoDoc1]

Without spoiling anything before I was at the final mission of the game, I wanted to get a Missing Person thing done but because I was tired I took the poster and saved in Las Hermanas. So I let the PS3 rest. After an hour or so I loaded my game then the screen got frozen trying to load the missing person. The final mission loaded, the ammo chests loaded and also the green house save point but not the missing person icon. So maybe it was just a bug because I had been playing tons of hours with Red Dead. So I reset the PS3 loaded the save still the same. So now what I did was rebuild database but still the screen froze. So maybe to avoid this glitch is to get the poster and save the missing person by bringing them back to the base then saving the game. Just a heads up to those who are playing. Stay safe!