Istio-Proxy 400 DPE http1.codec_error

Issue

• The application running in a pod within a project managed by ServiceMesh is encountering a connection issue when attempting to reach an external service endpoint that belongs to a different project, not managed by ServiceMesh or located outside the cluster.
• The error encountered is related to an incompatible SSL protocol version.
• The problem may occur immediately for a new project as well as for an existing one, as long as it is a dynamic environment where the ServiceMeshMemberRoll object contains more than one namespace and certain modifications, such as adding new namespaces, have been made

• After enabling additional debugging for Istio-Proxy, errors are observed in the Istio-Proxy logs related to communication with the external service from another project not managed by ServiceMesh. The logs show:

  400 DPE http1.codec_error