AWS IoT Core and Fleet Indexing connected:false response

Hi,

while I try Fleet Indexing, I found I always get a response of connected:false while the device is connected to the Iot core and publish message to iot core, anyone has faced this, thank you.

us-west-2

aws iot describe-index --index-name "AWS_Things" { "indexName": "AWS_Things", "indexStatus": "ACTIVE", "schema": "REGISTRY_AND_SHADOW_AND_CONNECTIVITY_STATUS" }

aws iot search-index --index-name "AWS_Things" --query-string "pm" { "things": [ { "thingName": "pm", "thingId": "{thingId}", "thingTypeName": "demo-iot", "thingGroupNames": [ "test_group" ], "shadow": "{"metadata":{},"version":1}", "connectivity": { "connected": false } } ] }