Mab 38 Mastery IV Bugged resets cannot complete

Product: Battlefield V
Platform:Microsoft XBOX One
Please specify your platform model. Microsoft Xbox One S
Are you using any software with an overlay? No
Which part of the game is the issue happening in? Multiplayer
Which part of the mode? Conquest
Please select your region North America
On which server did this happen? All many
When did this happen? (dd.mm.yy hh:mm) Wed jan 15 thurs jan 16
Summarize your bug MAB 38 Mastery IV is bugged keeps resetting at 1 killed to go.. 25 kills within 30 m or 7 in one round with in 25 something like that I could get 40 kills within 5 Mi it doesn't matter I should have had it five different times
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? My gamertag on Xbox One is BirthtoBurial10.. Pennsylvania USA
What happens when the bug occurs? Just will not let me achieve assignment
What should be happening instead? I should have the gold part for Mastery IV mab 38

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Mab 38 mastery IV bugged resets cant complete I did it five times just keeps resetting one kill shy