We are aware that ranked stats (and champion performance) are currently not updating properly. We are working together with Riot to resolve this issue.
Don’t worry, no data will be lost – it will come in as soon as the issue is resolved. Once this issue has been resolved, your summoner profiles (and the toplist) should update with all the latest stats.
Apologize for the inconveniences.
Update (January 23): This issue should now be resolved!