I recently completed the campaign missions, and afterwards I began liberating the remaining outposts. However, I've found that after I do liberate them, the game now freezes up. I've tried to liberate outposts five times, each resulting in a freeze. Twice, the game froze in the middle of combat, once after blowing up a jeep and once after a knife takedown. Three other times, the game froze after I received the orange "liberated" screen, with the screen going to black and staying there. In all cases, the music continued, but I had to close Far Cry from the PS4 menu, each time giving me an error. And each time, the game loaded me back at my previous fast travel location, without the outpost capture saved.
Needless to say, this is largely game-breaking, since so many mini-events are tied to liberated outposts, as well as some weapon unlocks. Luckily I have a backed-up save, though I would still lose several hours of playtime reverting to it, so I really hope there's some way I can fix this save.