403 Forbidden HTTP Request: POST https://api.prefect.cloud

From 1.08 using prefect cloud (prefect worker start) periodically (about 1-2 out of 3 scheduled launch times) I get an error

INFO | prefect.flow_runs.worker - Completed submission of flow run ‘ba1c0854-b6ca-4c5c-8c39-f2539e21d7f6’
17:15:06.604 | DEBUG | httpx._client - HTTP Request: POST https://api.prefect.cloud/api/accounts/хххх /workspaces/хххх /logs/ “HTTP/2 403 Forbidden”

raise PrefectHTTPStatusError.from_httpx_error(exc) from exc.cause
prefect.exceptions.PrefectHTTPStatusError: Client error ‘403 Forbidden’ for url ‘https://api.prefect.cloud/api/accounts/xxx /workspaces/xxx /logs/’
For more information check: 403 Forbidden - HTTP Status Code Glossary - WebFX
The code hasn’t changed
What could be the reason