Your team is using Cloud Data Fusion to build batch ETL pipelines that load data from Cloud Storage into BigQuery. You have several pipelines that run daily. Recently, one pipeline started failing with a 'Permission denied' error when trying to read a new CSV file uploaded to a specific Cloud Storage bucket. Other pipelines using the same bucket succeed. The failing pipeline has a Cloud Storage source plugin that uses a service account with the roles/storage.objectViewer role. The bucket has uniform bucket-level access enabled. What is likely causing the issue?