What version of gRPC and what language are you using?

grpc_unity_package.1.19.0-dev.zip and C# in Unity.

What operating system (Linux, Windows, …) and version?

MacOS

What runtime / compiler are you using (e.g. python version or version of gcc)

Issue happens in Android and I build the solution with IL2CPP.

What did you do?

Update from grpc_unity_package.1.18.0-dev.zip to 1.19.0
Make a request in MacOS
Make the same request in Android

What did you expect to see?

async request in osx successful
async request in android successful

What did you see instead?

async request in osx successful
async request in android failed with: "Name resolution failure"