Read updates in GroupChannel webhooks

Sendbird Chat API/SDK API
1

What are the rules around read_updates in the webhook group_channels:message_read ?

I sometimes receive payloads with read_updates filled and sometime with

"read_updates": [
      {
        "value": null
      }
    ]

Both cases from messages read from a React Native app using the JS Chat SDK.

Thanks!

2

Nevermind, I got to the bottom of this and its an issue with my BigQuery schema.