Stats updates in the client are on a 15 minute timer so if you just won a match your stats may not show up for 15 minutes.
The server reports all stats at the end of the match in bulk. If you get a kill, die, and leave the game your new kill count will not update until the server ends the match and the 15 minute timer described above elapses.
Wednesdays stats are not filled in yet. If you got a kill, or did anything really yesterday, it has not been backfilled yet.
PS4, XBox and PC stats are currently mutually exclusive.
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