In-game to post-game score screen

I’ve been seeing a lot of discrepancies between the score screen in game and the post-match stats, just wondering if anyone else is having this issue.

Mostly just a difference in the number of kills, for instance in lots of games it might say 22 kills on one guy in game, then 25 in the post-match stats when reviewing.

Just wondering, it seems to be happening relatively often, differing between 1-3 kills.