UNABLE TO CLAIM MILESTONE REWARD. PLS FIX THIS, THANKS

Product: Star Wars Battlefront II
Platform:PC
What is your issue related to? Challenges
Which part of it? Persistent
Summarize your bug Playing CO-OP with A280, completed the MILESTONE "A280 Sharpshooter" with in game display. Go to collection > Assault, and unable to claim the reward "IMPROVED RANGE". The icon was "greyed out" unable to equip the reward to the rifle A280
What is your gamertag/PSN ID/EA Account name? Macrick
How often does the bug occur? Every time (100%)
Can you tell us the date (MM/DD/YYYY) that you saw the bug? 01/20/20
What time did you see the bug? (HH:MM AM/PM) 1:24AM
In what game mode did the bug occur? Arcade Mode
What is your time zone? CTT - GMT + 8:00
Steps: How can we find the bug ourselves? Complete 150 kills with A280 on CO-OP mode with ONLY "IMPROVED COOLING" equipped. Go to ASSAULT>EQUIP WEAPONS>A280>IMPROVED RANGE
What happens when the bug occurs? Unable to claim reward for the milestone 150 kills with A280
What do you expect to see? I am expected to see the reward being able to be equip with my A280
Please select your region Asia
AMD or Nvidia Model Number GeForce GTX 1050Ti

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I tried to exit ST BF2 and ORIGIN.
Relaunch both and it still doesn't work!

Please fix this bug and get back to me asap, thank you.
Email: [edit: email address removed]
Origin ID: Macrick