Why does it take so long for Doctor Who episode reviews to be updated?

For the latest season, for example, the episodes are available from 8am UK time, prior to linear broadcast by about 10-11 hours. So, the time when everyone's looking for reviews on IMDB will be during that Saturday, prior to broadcast. However, we're now on Sunday, and STILL no episodes for ep.2 Lux have been approved. Can you please improve this for the rest of the series? https://www.imdb.com/title/tt32800925/externalreviews