Worker logs say this to all requests: API: unreachable.. retrying in 100ms

Logs of one of my workers say "API: unreachable.. retrying in 100ms" to all requests. See screenshot attached.

Then Runpod's API replies the following:
{ "delayTime": 10776,
"executionTime": 10206,
"id": "03fec117-c135-435b-bed1-577883d280d9-e1",
"output": "Error queuing workflow: <urlopen error [Errno 111] Connection refused>",
"status": "COMPLETED"}

The last item in the logs (other than "API: unreachable.. retrying in 100ms") says:
S[runpod-worker-comfy] WebSocket connection closed: no close frame received or sent

After this log the worker returned only "API: unreachable.. retrying in 100ms" and response as seen above.

Any ideas what may have caused this behavior and how to avoid it?
Other workers with the same docker image work fine.