Unity: 5.3.4f1
GPG: GooglePlayGames.PluginVersion.VersionString = "0.9.34"
Curiously there is double registration of resolver inside file Assets/PlayServicesResolver/Editor/ResolverVer1_2.cs
static ResolverVer1_2()
{
PlayServicesResolver.RegisterResolver(new ResolverVer1_2());
Debug.Log("Registering resolver version " + MajorVersion + "." +
MinorVersion + "." + PointVersion);
PlayServicesResolver.RegisterResolver(new ResolverVer1_2());
}
Looks like mistake...or maybe not?
Also I am seeing a lot of spam being logged to the console regarding the resolver version.
Upon loading project into the Unity editor:

Each time I enter play mode:

Thanks for the feedback - the next release will improve the resolver.
Fixed in 0.9.35
Most helpful comment
Fixed in 0.9.35