Co op kills not counting towards milestones

Product: Star Wars Battlefront II
Platform:PC
What is your issue related to? Challenges
Which part of it? Persistent
Summarize your bug The milestones for getting 50 kills with heavy and assault class in co-op mode both got stuck
What is your gamertag/PSN ID/EA Account name? Archarlas
How often does the bug occur? Every time (100%)
Can you tell us the date (MM/DD/YYYY) that you saw the bug?
What time did you see the bug? (HH:MM AM/PM)
In what game mode did the bug occur? Galactic Assault
What is your time zone? GMT (UTC)
Steps: How can we find the bug ourselves? I don't have any ideas on how to recreate this bug. I was trying to grind out the co-op milestones. The first game I played on said class the challenge worked. After that it got stuck
What happens when the bug occurs? The milestone gets stuck and I can't unlock it
What do you expect to see?
Please select your region Europe
AMD or Nvidia Model Number

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I tried unlocking the 50 kills in co-op mode with the assault class. The first game I played as assault the milestone tracked correctly and I got to 35/50 kills. I jumped into another match and played the assault class again. When I got out of the game I noticed there was no unlocks waiting for me even though I was positive I got enough kills to warrant it. I checked the career panel and the challenge still listed 35/50. I tried doing the same thing with the heavy class. As before, the first game registered properly for the milestone. After that unfortunately this milestone also got stuck.