Fixed reconnect logic

src/Discord.Net/DiscordSocketClient.cs

@@ -234,6 +234,8 @@ namespace Discord
             }
         }
         private async Task ReconnectInternalAsync()
+        {
+            try
             {
                 int nextReconnectDelay = 1000;
                 while (_isReconnecting)
@@ -256,9 +258,14 @@ namespace Discord
                     catch (Exception ex)
                     {
                         await _gatewayLogger.WarningAsync("Reconnect failed", ex).ConfigureAwait(false);
+                    }                }
             }
-            }
+            finally
+            {
+                _isReconnecting = false;
                 _reconnectTask = null;
+
+            }
         }
 
         /// <inheritdoc />
@@ -397,6 +404,7 @@ namespace Discord
                                 await ApiClient.SendResumeAsync(_sessionId, _lastSeq).ConfigureAwait(false);
                             else
                                 await ApiClient.SendIdentifyAsync().ConfigureAwait(false);
+                            _heartbeatTime = 0;
                             _heartbeatTask = RunHeartbeatAsync(data.HeartbeatInterval, _heartbeatCancelToken.Token);
                         }
                         break;