Grunt mech commondation not going up

My Grunt mech com isn’t going up when I kill the Grunt mech in WZ/WZFF does anyone know why?

There’s an existing topic on this here: https://www.halowaypoint.com/en-us/forums/6e35355aecdf4fd0acdaee3cc4156fd4/topics/grunt-mech-commendation/94105836-1887-44d7-8c59-b6dd46b6ef12/posts but I believe what’s going on is you don’t have to get the final shot to get the medal but you do have to get the final shot to get the commendation to go up. Multiple Spartans can get the medal for the kill, but only one will get the credit.