Distinguished Intelligence Service medal not received

Product: Battlefield V
Platform:PC
Please specify your platform model. PC
AMD or Nvidia Model Number RTX 2080Ti
Enter RAM memory size in GB 16GB
Are you using any software with an overlay? No
Which part of the game is the issue happening in? Single Player War Story
Which part of the mode? Under No Flag
Please select your region Asia
On which server did this happen?
When did this happen? (dd.mm.yy hh:mm) 20.11.2019 19:35
Summarize your bug I collected all 40 of the required letters.However Distinguished intelligence service medal was still not awarded,instead it says i only have 39.
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? Maybe you should play singleplayer for once and have a game crash.
What happens when the bug occurs? I had serveral game crash when I was playing singleplayer.But in the end I successfully collected all the letters.However it said that I only have 28 of the 40 letters required,in spite of I have all 40.
What should be happening instead? The medal should be awarded to me.

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Hi dear developers, I collected all the letters in Under No Flag, Nordlys and Tirailleur,but I still couldn't unlock the Distinguished Intelligence Service medal.

I have all 40 of the required letters so why haven't I unlocked it?

I saw that some players in forum had the same problem,so do you guys have any solutions?Please tell us,thank you!