When analyzing this question on MathOverflow Meta, I noticed that this user's reputation history doesn't show the three upvotes to their recent community wiki answer; there's not even an entry without the green +x reputation label:
However, my own reputation history, even when viewing while being logged in as another account, does show two recent upvotes to this FAQ.
Further analysis by Martin shows that it might be related to not having any other reputation events that day; I've checked some old posts of mine on MathOverflow and can confirm.
/reputation
either. However, showing them inconsistently like this doesn't seem status-bydesign.