Weapon Of Choice Achievement Glitched

My xbone’s achievement says i have 100% and the progress bar is full but the achievement does not want to unlock. I have used all the weapons several times to get kills and nothing. I have gotten kills with the weapons all from picking them up and as well from load outs. I also made sure to finish my missions in hopes that the progress would pop the achievement. Anybody else who has this issue or has a solution it would be much appreciated.

I have the identical issue but with another achievement which I posted here:

https://forums.halowaypoint.com/yaf_postsm2826310_Brute-Force-Acheivement--XBOX-ONE--glitched.aspx#post2826310

This is a platform issue, not a game issue. We reached out to Xbox Live Support and they are aware of this problem and are working on a fix. For additional information, you can reach out to them directly.