In case you haven’t tried yet, please check the troubleshooting guide for recommended steps to rule out application side failure:

• Check Cloud Logging

• App-level timeouts

• Downstream network bottleneck

• Inbound request limit to a single container

Another thing to consider is investigating if there’s a mismatch in the location of your resources. This solution works here and could be useful to you (hopefully).

If the above options still won’t resolve it, this could be a Cloud Run specific issue and better addressed by the Google Cloud Support team. You may reach out to them via below channels:

• Premium support - paid support option

• Cloud Run Public Issue Tracker - full list of open tickets