Request for https://homegraph.googleapis.com/v1/devices:requestSync failed: 429

I have this error below
According to Request Sync  |  Actions on Google Smart Home  |  Google Developers, need to set async flag to true
Anybody has idea about this?

2021-06-02 15:15:36 ERROR (MainThread) [homeassistant.components.google_assistant.http] Request for https://homegraph.googleapis.com/v1/devices:requestSync failed: 429
1 Like

Me too, same error…
Found this on Google docs

  • 429 - Failure: Maximum number of concurrent sync requests has been exceeded for the given agentUserId. A caller may only issue one concurrent sync request unless the async flag is set to true.

same problem here.
this happens only in startup. if I’ll do manually works…

I still have this annoying problem only on startup.
Here is the yaml code for the automation I am using.
is it, perhaps, necessary to wait a few minutes after the start of the HA?

- alias: Google Assistant Sync
  trigger:
  - event: start
    platform: homeassistant
  condition: []
  action:
  - service: google_assistant.request_sync
    data:
      agent_user_id: 123456789