Go to: https://nomadic-labs.gitlab.io/teztale-dataviz/Level#server=https%253A%252F%252Fteztale-ghostnet.obs.nomadic-labs.cloud%252F&block=16224898&round=0&summary=attestations&source=sagotch
then, go to the next level
you can see that tz1aWXP237BLwNHJcCD4b3DutCevhqq2T1Z9 is present twice: as Valid and as Lost.
Refresh the page, and the leftover (the one in Valid) is removed: