Composer 3 Triggerer doesn't seem to have access to Secret Manager

After migrating from Composer 2 to Composer 3, we noticed that Triggers that use a connection or variable from the GCP Secret Manager do not receive the secret. You receive the error message “Connection not found”.

The same connection can be accessed by a Composer 3 worker.

Is there a change in Triggerer workload between Composer 2 and Composer 3 that explains this issue?

I couldn’t find anything in the Composer 3 documentation.