Ok...is there a specific game you've been playing? It's possible it's that individual game. That was the case with Sound Shapes. From what I'm reading, it's incredibly rare for trophies to pop without a timestamp on the PS4. The only instances I can find of it occurring are from A: Specific games that will require a patch to resolve the issue, and B: Hacked trophies.
- "If you have the heart of a true winner, you can always get more pissed off than some other asshole."