[CLIENT] Missing Games in Profile Stats

I wanted to check my Stats in the Client and noticed that my Winrate and Games played with Rakan was wrong.
The Client says i have played 23 Games with a 57% Winrate, but op.gg says i have 28 Games with a 64% Winrate, so 5 Games (all wins) are missing in the stats. None of these Games were played before Midseason, they were all played this month.
Screenshot of my Stats in the Client:
https://i.imgur.com/RNs8jyt.png
Screenshot of my op.gg stats:
https://i.imgur.com/ikyC4df.png