Change based on feedback

src/Discord.Net.WebSocket/DiscordSocketClient.cs

@@ -1465,7 +1465,7 @@ namespace Discord.WebSocket
                                     var data = (payload as JToken).ToObject<VoiceServerUpdateEvent>(_serializer);
                                     var guild = State.GetGuild(data.GuildId);
                                     var cacheable = new Cacheable<IGuild, ulong>(guild, data.GuildId, guild != null,
-                                        async () => (IGuild) await ApiClient.GetGuildAsync(data.GuildId));
+                                        async () => await ApiClient.GetGuildAsync(data.GuildId).ConfigureAwait(false) as IGuild);
 
                                     var voiceServer = new SocketVoiceServer(cacheable, data.GuildId, data.Endpoint, data.Token);
                                     await TimedInvokeAsync(_voiceServerUpdatedEvent, nameof(UserVoiceStateUpdated), voiceServer).ConfigureAwait(false);