"New games" on "Your Plays By Month" page is not always accurate

[mugs]

You can see on BGG I first played Papayoo in October 2020

On my Your Plays By Month page the Monthly Skyline shows 0 new games played in October 2020. The Plays By Month (Ever) chart also shows 0 new games played in October 2020.

On the Your Plays page the Rate of Play of Games New to You graph does show Papayoo (it is the 49th new game I played in 2020).

This is just one example, but I've seen this happen several times in the past.