Strange thing is Tech-Support told me that they are looking into it why this happens on some consoles, but I guess this happens on all consoles. No matter which model of the consoles..
Like I said this happened on my old 80gb fat ps3 and now even on my brand new super slim ps3 with 500gb.
So Im talking about the latest model of the ps3! Latest firmware installed.. tried it with and without the patches for gta5. At one point I even thought its because of the firmware from sony released in december 2013. Dont know..