Problem with getting rows from related table after migration to appwrite 20

Hi, I migrated the Appwrite SDK to 1.8.0 and the package in my Flutter app to version ^20.3.2.
I noticed one thing is different. Previously, when I got a JSON record from a table that has a related table (revisionBooks), the field contained [_JsonMap]. Now I only get an id. I can show the difference on screen. In the Appwrite panel everything looks correct (second screen) - when I click on the id in the revisionBook field, it shows me the details from the related table.
For testing purposes, I downgraded only the package from 20.3.2 to 17.0.0, and everything works correctly like before.

https://appwrite.io/blog/post/announcing-opt-in-relationship-loading

Thanks, it's working!