On OP.GG, tier information is not updated in real time for all summoners. Instead, it is updated when a user visits the site and clicks the [Update] button on their match history page.
As a result, even if a higher tier was temporarily achieved, it may not be recorded if the update was not performed at that time.
Additionally, Top Tier information is not stored or retained separately. Therefore, depending on how frequently the service is used and when updates occur, there may be differences between the actual record and the information displayed.
Please note that once such information is missing, it cannot be recovered. If you are promoted or reach your Top Tier, be sure to click the [Update] button to ensure the record is not lost.