envoy error: string field contains invalid UTF-8

[deepakd10]

While trying to send ProcessingResponse_ImmediateResponse, with payload of format different than UTF-8, envoy throws error saying

"error":"rpc error: code = Internal desc = grpc: error while marshaling: string field contains invalid UTF-8"

Content-Type: application/vnd.amazon.eventstream

sample payload

�������R��=��:event-type��messageStart
:content-type���application/json
:message-type���event{"p":"abcdefghijklmnopqrstuvwxy","role":"assistant"}�����������W�����:event-type���contentBlockDelta
:content-type���application/json
:message-type���event{"contentBlockIndex":0,"delta":{"text":"I"},"p":"abcdefghijklmno"}

details on vnd.amazon.eventstream https://docs.aws.amazon.com/lexv2/latest/dg/event-stream-encoding.html

[valerian-roche]

Hey @deepakd10
From my understanding this issue relates to envoy and not the go-control-plane itself. If it is the case can you create an issue on the main repository. Otherwise can you provide more details on where this occurs?