diff --git a/src/Client.php b/src/Client.php
index 57f99a9..63007b7 100644
--- a/src/Client.php
+++ b/src/Client.php
@@ -197,19 +197,12 @@ public function connect(): self
         if ($this->client->isConnected()) {
             return $this;
         }
-
-        // Validate connection parameters before attempting connection
-        $validateConnectionParams = function () {
-            if (empty($this->host)) {
-                throw new Exception('MongoDB host cannot be empty');
-            }
-            if ($this->port <= 0 || $this->port > 65535) {
-                throw new Exception('MongoDB port must be between 1 and 65535');
-            }
-        };
-
-        $validateConnectionParams();
-
+        if (empty($this->host)) {
+            throw new Exception('MongoDB host cannot be empty');
+        }
+        if ($this->port <= 0 || $this->port > 65535) {
+            throw new Exception('MongoDB port must be between 1 and 65535');
+        }
         if (!$this->client->connect($this->host, $this->port)) {
             throw new Exception("Failed to connect to MongoDB at {$this->host}:{$this->port}");
         }
@@ -261,17 +254,15 @@ public function query(array $command, ?string $db = null): stdClass|array|int
             if (is_array($sessionData) && isset($sessionData['id'])) {
                 $command['lsid'] = $sessionData['id'];
                 $rawId = $sessionData['id']->id ?? null;
-                $sessionId = $rawId instanceof \MongoDB\BSON\Binary
-                    ? bin2hex($rawId->getData())
-                    : $rawId;
             } else {
                 $command['lsid'] = $sessionData;
                 $rawId = $sessionData->id ?? null;
-                $sessionId = $rawId instanceof \MongoDB\BSON\Binary
-                    ? bin2hex($rawId->getData())
-                    : $rawId;
             }
 
+            $sessionId = $rawId instanceof \MongoDB\BSON\Binary
+                ? bin2hex($rawId->getData())
+                : $rawId;
+
             // Add transaction parameters if session is in transaction
             if ($sessionId && isset($this->sessions[$sessionId]) &&
                 $this->sessions[$sessionId]['state'] === self::TRANSACTION_IN_PROGRESS) {
@@ -346,7 +337,6 @@ public function query(array $command, ?string $db = null): stdClass|array|int
         $message = pack('V*', 21 + strlen($sections), $this->id, 0, 2013, 0) . "\0" . $sections;
         $result = $this->send($message);
 
-        // Update causal consistency timestamps from response
         $this->updateCausalConsistency($result);
 
         // Update session last use time if session was provided
@@ -367,7 +357,23 @@ public function query(array $command, ?string $db = null): stdClass|array|int
      */
     public function send(mixed $data): stdClass|array|int
     {
-        $this->client->send($data);
+        // Check if connection is alive, connect if not
+        if (!$this->client->isConnected()) {
+            $this->connect();
+        }
+
+        $result = $this->client->send($data);
+
+        // If send fails, try to reconnect once
+        if ($result === false) {
+            $this->close();
+            $this->connect();
+            $result = $this->client->send($data);
+            if ($result === false) {
+                throw new Exception('Failed to send data to MongoDB after reconnection attempt');
+            }
+        }
+
         return $this->receive();
     }
 
@@ -397,8 +403,8 @@ private function receive(): stdClass|array|int
                 if ($this->client instanceof CoroutineClient) {
                     Coroutine::sleep(0.001); // 1ms for coroutines
                 } else {
-                    \usleep($sleepTime); // Microsecond precision for sync client
-                    $sleepTime = \min($sleepTime * 1.2, 10000); // Cap at 10ms for faster checking
+                    \usleep((int)$sleepTime); // Microsecond precision for sync client
+                    $sleepTime = (int)\min($sleepTime * 1.2, 10000); // Cap at 10ms for faster checking
                 }
                 continue;
             }