The Last of Us [BCUS98174]

The game is running great for me except for the major showstopper of random freezes. Do we know of a definitive answer as to why this is happening, and a way of solving it? Even reducing it to be less frequent would be something. Sometimes the game will freeze on the first warning screen, other times - with the exact same settings - it is playable for several minutes. There seems no rhyme or reason to it. I've read the whole thread and tried all the suggestions. I've tried older versions of RPCS3 as well as the latest current version.