Importing from GA3 failing to import custom dimensions

We’re trying to import data from GA3, which includes several custom dimensions. They appear to be recognised by the import as they are re-created in Matomo, but no data is imported at all.

For example, we have a custom dimension dimension12 named “Product - Name”. If I use the Google API I get data returned, so I know there is accessible data:


Can anyone suggest any reasons why this isn’t working? Not being able to import these is a real blocker for us moving forward.

Have you discovered a solution to this problem? I’m also interested in learning more about it. GA3 property data holds significant importance for me. Furthermore, any insights or updates regarding this matter would be greatly appreciated. Feel free to share any relevant information you have.