Weapon dosen't unlock

Product: Battlefield V
Platform:PC
Please specify your platform model. PC
AMD or Nvidia Model Number Gtx 1080 Ti
Enter RAM memory size in GB 16GB
Which part of the game is the issue happening in? Multiplayer
Which part of the mode? Conquest
Please select your region Europe
On which server did this happen?
When did this happen? (dd.mm.yy hh:mm)
Summarize your bug my m95 is bugged can't get it to unlock always says unlock next round
How often does the bug occur? Rarely (0% - 9%)
Steps: How can we find the bug ourselves? It happend on a bugged Arras match where the timer stuck at 0:00 and one kill left
What happens when the bug occurs? weapons unlocked in this match get bugged because you need to leave i think
What should be happening instead? weapon should get unlocked even when leaving

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Weapon dosen't unlock but im at sniper rank 7