We are no longer experiencing any delays, the speed is back to normal and no data has been lost.

We have identified that the network connection was running slow between one of the shards databases and the historical data servers. In turn, this caused a delayed writing process.
Our technical team is working on a fix for this, to bring the speed back to normal.

We are experiencing delays with processing today's ranks and Visibility.
Our tech team is investigating and we will provide updates as soon as possible.