Conquering the mountains achievement issue (steam version)

Hi,

I have put around 150 hours into BF1 trying to get all the achievements on steam and finally got down to the last few codex entries with a huge sign of relief and upon finishing Avanti Savoia and getting the codex entries right at the end it seems my connection was lost to the EA servers despite my internet connection being fine. The achievement conquering the mountains popped on steam and also on the EA in-game overlay after i got the last codex entry but i noticed it did not track it on my steam account or on the EA desktop app, i was logged in the entire time playing the single player campaign. I then went and finished the same campaign multiple times and nothing still. I went and grabbed the last few codex entries from the runner which bumped me up to 53/53 codex entries and the hills of gallipoli popped and master of adaption so it did actually track everything correctly yet conquering the mountains is still locked and i am on 49/50 achievements. 

I saw hundreds of other people had this same problem and its been years so i do not have any hope of this getting fixed, but i guess the community may have come across the issue and may have a solution hopefully.

Wolf.