Device shadow state updates delayed when syncing via MQTT Pub/Sub bridge integration

ryan_wizard
Sun, 09 Feb 2025 08:19:50 +0000

Another thing to verify: are you updating the entire shadow document or just the delta? Full shadow updates take longer to propagate. We switched to delta-only updates and saw our propagation time drop from 3 minutes to under 20 seconds for a similar-sized fleet. The shadow merge operation is much faster when you’re only changing specific fields.