diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 0bbe8ad3d..f1054adba 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -181,6 +181,13 @@ services:
       - AWS_ACCESS_KEY_ID=${S3_ACCESS_KEY:?S3_ACCESS_KEY must be set}
       - AWS_SECRET_ACCESS_KEY=${S3_SECRET_KEY:?S3_SECRET_KEY must be set}
       - AWS_REGION=${AWS_REGION:-us-east-1}
+      # v1.0.10 polish: enable the S3 stack and route track uploads through
+      # MinIO end-to-end. Without these two flags, defaults (local +
+      # disabled) win and the AWS_S3_* credentials above are inert. With
+      # blue/green active/active behind HAProxy, local-disk uploads on
+      # one pod are invisible to the other — S3 is required for HA.
+      - AWS_S3_ENABLED=true
+      - TRACK_STORAGE_BACKEND=s3
       - HLS_STREAMING=true
       - HLS_STORAGE_DIR=/data/hls
     volumes:
@@ -236,6 +243,13 @@ services:
       - AWS_ACCESS_KEY_ID=${S3_ACCESS_KEY:?S3_ACCESS_KEY must be set}
       - AWS_SECRET_ACCESS_KEY=${S3_SECRET_KEY:?S3_SECRET_KEY must be set}
       - AWS_REGION=${AWS_REGION:-us-east-1}
+      # v1.0.10 polish: enable the S3 stack and route track uploads through
+      # MinIO end-to-end. Without these two flags, defaults (local +
+      # disabled) win and the AWS_S3_* credentials above are inert. With
+      # blue/green active/active behind HAProxy, local-disk uploads on
+      # one pod are invisible to the other — S3 is required for HA.
+      - AWS_S3_ENABLED=true
+      - TRACK_STORAGE_BACKEND=s3
       - HLS_STREAMING=true
       - HLS_STORAGE_DIR=/data/hls
     volumes:
diff --git a/docker-compose.staging.yml b/docker-compose.staging.yml
index 6e6a090ad..74e55aa46 100644
--- a/docker-compose.staging.yml
+++ b/docker-compose.staging.yml
@@ -77,6 +77,11 @@ services:
       - AWS_ACCESS_KEY_ID=${STAGING_S3_ACCESS_KEY:?STAGING_S3_ACCESS_KEY must be set}
       - AWS_SECRET_ACCESS_KEY=${STAGING_S3_SECRET_KEY:?STAGING_S3_SECRET_KEY must be set}
       - AWS_REGION=us-east-1
+      # v1.0.10 polish: enable the S3 stack and route track uploads through
+      # MinIO end-to-end. Without these two flags, defaults (local +
+      # disabled) win and the AWS_S3_* credentials above are inert.
+      - AWS_S3_ENABLED=true
+      - TRACK_STORAGE_BACKEND=s3
       - HLS_STREAMING=true
       - HLS_STORAGE_DIR=/data/hls
     volumes: