What causes glitched trophies

[HellCU3ED]

I want to play this game but due to a severe lack of information I'm paranoid about getting locked out of the platinum. It's been 3 years and nobody even seems to have the first clue about what causes it. some say dlc but others with no dlc have the glitch. I've seen people say it popped on an alt account bit glitched on their main so the conditions are identical.

Please guys any info at all will help

[Kavatus]

One theory is also that if you have played battlefield 3 it unlocks one of the classes so you "cant" unlock one nation for each classes. I got trophy glitch on me aswell.

Game is also somewhat dead when I played it some months ago. I think there were 2 or 3 full servers and rest empty.

[HellCU3ED]

Thanks for trying but I'm sure you know people with and without the BF3 have had it happen to them. There are people playing I gave it a couple of hours the other day on my spare account didn't get as far as to test global warfighters.

[amebapiko]

I played BF3 prior and I don't think I encountered any trophy glitches, I think I had dlc installed from the start too. 

[HellCU3ED]

This is what I mean the dlc is the obvious culprit but in reality it doesn't fit lots of people got on just fine with dlc installed.

What I wonder is if no-one knows the cause what did they patch when they said they fixed it in 2013, it didn't work obviously perhaps it's rarer now than before though

[Asuka Langley]

It seems the glitch didn't hit me, I had installed the LE pass and Optics from the PS store, but I didn't have the Map Pack... I'm resisting buying the map pack just in case it fucks it all up, but it's still a long path to the end of the road and the DLC would make life a lot easier ; w ;

[HellCU3ED]

Thanks for the replys, I'd get the maps it's very difficult to make progress without them, I'm not just advising you too I got them too and wouldn't have if I didn't think it was safe.

After watching this for a while here are my conclusions as far as the trophy glitches go I'm pretty convinced these are fixed at source with the server update (not the patch but you'll need it anyway) everyone I've encountered since update has gotten their stuff. The reason you still hear the odd person not is because they were started or past it before the update if this is the case the game doesn't keep checking to see if you've reached the criteria unlike a single action trophy. Much like ghostbusters if you started before the update it doesn't look good for you the update or patch won't fix your problem, if your new your good to go.

[JaapertNL]

I started this game about 8 months ago and the trophy has glitched on me. I did not play BF3 before nor did I install any DLCs. I have tried deleting and reinstalling the game, playing on another ps3, played the disc version and psn version but non of them worked.