Issue with gRPC in k6 v1.0.0

[ClaytonAB]

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Brief summary

Issue with gRPC moving from v0.47.0 to v1.0.0.

k6 version

v1.0.0

OS

macOS

Docker version and image (if applicable)

Sample docker server located at git clone https://github.com/AccelByte/matchmaking-function-grpc-plugin-server-go.git.

• Setup instructions - https://docs.accelbyte.io/gaming-services/services/extend/override/matchmaking/get-started-matchmaking-v2/
• patch for envoy:

diff.patch

sample-project.zip

Steps to reproduce the problem

• Create a test that connects to a gRPC server using v0.47.0 and the experimental gRPC module import { Client, Stream } from 'k6/experimental/grpc'; xk6 build v0.47.0 --with github.com/grafana/xk6-grpc
• Test and the script is able to connect to the server and load test completes
• Upgrade to the latest version of k6 v1.0.0 and the gRPC now included in the core import grpc from 'k6/net/grpc'; k6 v1.0.0 (go1.24.2, darwin/arm64)
• Observe: Now unable to connect to the gRPC server

Expected behaviour

I would expect that connecting to the gRPC service would still work.

Actual behaviour

Instead of being able to connect k6 returns the following error: ERRO[0060] GoError: context deadline exceeded: connection error: desc = "error reading server preface: http2: failed reading the frame payload: %!w(<nil>), note that the frame header looked like an HTTP/1.1 header"