[INFO/Workaround Fix] War Story Rewards Not Granted

Ah these kids :-) when you search "last tiger" in the search above you will find a ton of related post including masses with the solution:

For PS4 you can try this: 

1. Export the game save files to an USB drive.
2. Delete the game save files in the console.
3. Start the game. You'll have to adjust contrast and play again the intro.
4. Now, play the War Story and complete the bugged challenge. It will show correctly achieved.
5. Close the game, and restore the game save files from the USB to the console.
6. Start the game, and you'll have your reward at the armory.

I hope it works for you.