Bug report

What Debezium connector do you use and what version?

2.2.Final MongoDB connector 

What is the connector configuration?

capture.mode: "change_streams"

What is the captured database version and mode of deployment?

MongoDB Atlas 4.4 

What behavior do you expect?

After enabling the capture.mode change stream I expect the updateDescription to have value, the before field to be null, and the after field to the null 

What behavior do you see?

updateDescription is still null and the after field contains the full document

Do you see the same behavior using the latest released Debezium version?

Yes, I use 2.2.Final 

Do you have the connector logs, ideally from start till finish?

Not sure what log would help with this issue, let me know if I can add anything to the ticket 

How to reproduce the issue using our tutorial deployment?

Run the connector with the capture.mode `change_streams and check the payload for the update events