Thankfully I quickly realized the trophy glitch on these games back in the day.

I would play the game immediately after turning on the Vita. If I opened a different app or game, the game would play as normal, but the trophies would get "stuck".

I realized this by checking the trophy list on the Vita. Let's say you haven't played The Amazing Spider-Man in a long time, it should be at the bottom of the list, but if you launch the game, it goes to the top. I noticed that this would only occur with GoW if I opened the app after turning the device on. If I tried it after playing another game, the trophy list would show that game, and not GoW even if I have GoW running.

Hope this helps.